CN218728758U - Voltage generation unit and electronic device - Google Patents

Voltage generation unit and electronic device Download PDF

Info

Publication number
CN218728758U
CN218728758U CN202190000058.XU CN202190000058U CN218728758U CN 218728758 U CN218728758 U CN 218728758U CN 202190000058 U CN202190000058 U CN 202190000058U CN 218728758 U CN218728758 U CN 218728758U
Authority
CN
China
Prior art keywords
voltage
module
adjustment
resistor
coefficient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202190000058.XU
Other languages
Chinese (zh)
Inventor
周号
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Maiju Microelectronics Co Ltd
Original Assignee
Zhuhai Maiju Microelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202110251369.XA external-priority patent/CN113031686A/en
Priority claimed from CN202110250456.3A external-priority patent/CN112859990A/en
Application filed by Zhuhai Maiju Microelectronics Co Ltd filed Critical Zhuhai Maiju Microelectronics Co Ltd
Application granted granted Critical
Publication of CN218728758U publication Critical patent/CN218728758U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The present disclosure provides a voltage generation unit including: the first voltage generating module is used for generating a first voltage; the second voltage generation module is used for generating a second voltage; the second voltage adjusting module is used for receiving a second voltage and adjusting the second voltage to output a second adjusting voltage; the control module receives the first voltage and the second adjusting voltage, and controls the second voltage adjusting module to adjust the second voltage based on the related information of the first voltage and/or the related information of the second adjusting voltage; and an addition module that receives the first voltage adjustment value and the second adjustment voltage and generates a third voltage, wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjustment voltage difference value at two times. The present disclosure also provides an electronic device.

Description

Voltage generation unit and electronic device
Technical Field
The present disclosure relates to a voltage generation unit and an electronic apparatus.
Background
In an integrated circuit, an absolute voltage is required as a reference value for a stability criterion, but the voltage value varies depending on external conditions. Therefore, how to obtain the voltage reference value is a technical problem which is always solved in the field.
In the prior art, the stability of the output voltage is mainly improved by improving the electronic device of the reference source, but the improvement of the electronic device inevitably increases the cost, and the electronic device is influenced by external conditions, and the parameters of the electronic device are changed, so that the voltage output is influenced to a greater or lesser extent even if the improvement is carried out.
For example, in a reference source affected by temperature, the prior art is usually used to eliminate the first-order effect, and the high-order effect still exists, so that the variation of the reference voltage generated by the temperature-affected reference source still exists.
Disclosure of Invention
In order to solve one of the above technical problems, the present disclosure provides a voltage generation unit and an electronic device.
According to an aspect of the present disclosure, 1. A voltage generation unit includes:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
the second voltage adjusting module is used for receiving a second voltage and adjusting the second voltage to output a second adjusting voltage;
the control module receives the first voltage and the second adjusting voltage, and controls the second voltage adjusting module to adjust the second voltage based on the related information of the first voltage and/or the related information of the second adjusting voltage; and
an addition module that receives the first voltage and the second adjustment voltage and generates a third voltage,
wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjustment voltage difference value at two times.
According to at least one embodiment of the present disclosure, further comprising:
the first analog-to-digital conversion module is used for acquiring a first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring a second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
According to at least one embodiment of the present disclosure, the first analog-to-digital conversion module and the second analog-to-digital conversion module use the third voltage as a target voltage so as to convert the first voltage into a first digital signal and convert the second adjustment voltage into a second digital signal.
According to at least one embodiment of the present disclosure, the second voltage adjusting module includes a second coefficient adjusting module and a second multiplying module, the control module controls adjustment of the second coefficient, and the second multiplying module multiplies the adjusted second coefficient by the second voltage to obtain a second adjusted voltage.
According to at least one embodiment of the present disclosure, the control module determines whether a first difference between a first digital signal of a first voltage at a first time and a first digital signal of the first voltage at a second time is equal to a second difference between a second digital signal of a second adjustment voltage at the first time and a second digital signal of the second adjustment voltage at the second time, and adjusts the second coefficient if the first difference is not equal to the second difference.
According to at least one embodiment of the present disclosure, at the first time, the second coefficient is adjusted such that the third voltage at the first time is equal to the desired voltage.
According to at least one embodiment of the present disclosure, if the second difference is greater than the first difference, the second coefficient is decreased, and a second difference between the second digital signal of the second adjustment voltage generated according to the decreased second coefficient and the second digital signal of the second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal to the first difference, the second coefficient is continuously decreased until the second difference is equal to the first difference.
According to at least one embodiment of the present disclosure, if the second difference is smaller than the first difference, the second coefficient is increased, and a second difference between the second digital signal of the second adjustment voltage generated according to the increased second coefficient and the second digital signal of the second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal to the first difference, the second coefficient is continuously increased until the second difference is equal to the first difference.
According to at least one embodiment of the present disclosure, further comprising: the control module controls the first voltage adjusting module and/or the second voltage adjusting module to adjust the first voltage and/or the second voltage based on the relevant information of the first adjusting voltage and/or the relevant information of the second adjusting voltage.
According to at least one embodiment of the present disclosure, the control module determines whether a first difference between a first digital signal of a first adjustment voltage at a first time and a first digital signal of the first adjustment voltage at a second time is equal to a second difference between a second digital signal of a second adjustment voltage at the first time and a second digital signal of the second adjustment voltage at the second time, and adjusts the first coefficient and/or the second coefficient if the first difference is not equal to the second difference.
According to at least one embodiment of the present disclosure, at the first time, the first coefficient and/or the second coefficient are adjusted such that the third voltage at the first time is equal to the desired voltage.
According to at least one embodiment of the present disclosure, if the second difference is greater than the first difference, the second coefficient is decreased and/or the first coefficient is increased, the first difference and the second difference are obtained again, and the first difference and the second difference are continuously compared, and if the first difference and the second difference are not equal, the second coefficient is decreased and/or the first coefficient is increased until the second difference is equal to the first difference.
According to at least one embodiment of the present disclosure, if the second difference is smaller than the first difference, the second coefficient is increased and/or the first coefficient is decreased, the first difference and the second difference are obtained again, the first difference and the second difference are continuously compared, and if the first difference and the second difference are not equal, the second coefficient is increased and/or the first coefficient is decreased until the second difference is equal to the first difference.
According to another aspect of the present disclosure, a voltage generation unit includes:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
the first voltage adjusting module is used for receiving a first voltage and adjusting the first voltage to output a first adjusting voltage;
the second voltage adjusting module is used for receiving a second voltage and adjusting the second voltage to output a second adjusting voltage;
the control module receives the first adjusting voltage and the second adjusting voltage, and controls the first voltage adjusting module and/or the second voltage adjusting module to adjust the first voltage and/or the second voltage based on the relevant information of the first adjusting voltage and/or the relevant information of the second adjusting voltage; and
and the addition module receives the first adjustment voltage and the second adjustment voltage and generates a third voltage.
According to at least one embodiment of the present disclosure, further comprising:
the first analog-to-digital conversion module is used for acquiring a first adjustment voltage, performing analog-to-digital conversion on the first adjustment voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring a second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
According to at least one embodiment of the present disclosure, the first analog-to-digital conversion module and the second analog-to-digital conversion module use the third voltage as a target voltage so as to convert the first adjustment voltage into a first digital signal and convert the second adjustment voltage into a second digital signal.
According to at least one embodiment of the present disclosure, the first voltage adjusting module includes a first coefficient adjusting module and a first multiplying module, the control module controls adjustment of the first coefficient, and the first multiplying module multiplies the adjusted first coefficient by the first voltage to obtain a first adjusted voltage; or
The second voltage adjusting module comprises a second coefficient adjusting module and a second multiplying module, the control module controls the adjustment of the second coefficient, and the second multiplying module multiplies the adjusted second coefficient by the second voltage to obtain a second adjusting voltage.
According to at least one embodiment of the present disclosure, the control module controls the first voltage adjustment module to adjust the first voltage according to a difference between the first adjustment voltage at the second time and the first voltage at the first time; or
The control module controls the second voltage adjusting module to adjust the second voltage according to a difference between the second adjusting voltage at the second time and the second voltage at the first time,
wherein the second time is a time after the first time.
According to at least one embodiment of the present disclosure, the control module controls on the basis that a difference between the first adjustment voltage at the second timing and the first voltage at the first timing is equal to zero, or controls on the basis that a difference between the second adjustment voltage at the second timing and the second voltage at the first timing is equal to zero.
According to at least one embodiment of the present disclosure, the first analog-to-digital conversion module receives a first adjustment voltage at a first time and a first adjustment voltage at a second time, obtains a first voltage variation value according to the first adjustment voltage at the first time and the first adjustment voltage at the second time, and
the second analog-to-digital conversion module receives a second adjustment voltage at a first moment and a second adjustment voltage at a second moment, and obtains a second voltage change value according to the second adjustment voltage at the first moment and the second adjustment voltage at the second moment.
According to at least one embodiment of the present disclosure, the control module adjusts the first adjustment voltage and/or the second adjustment voltage according to a comparison result of the first voltage variation value and the second voltage variation value.
According to at least one embodiment of the present disclosure, the control module adjusts the first voltage and/or the second voltage on the basis of a difference between the first voltage variation value and the second voltage variation value being equal to zero.
According to at least one embodiment of the present disclosure, when the variation value of the first voltage is greater than the second voltage variation value, the first adjustment voltage is caused to increase and/or the second adjustment voltage is caused to decrease.
According to at least one embodiment of the present disclosure, the control module adjusts the first voltage to obtain a first adjusted voltage based on a first functional relationship between the external condition and the first voltage generated by the first voltage generation module, and/or the control module adjusts the first voltage to obtain a first adjusted voltage based on a second functional relationship between the external condition and the second voltage generated by the second voltage generation module.
According to at least one embodiment of the present disclosure, the voltage generation unit further comprises a detection module for detecting an external condition to obtain a first adjustment voltage according to the detected external condition and a first functional relationship, and/or to obtain a second adjustment voltage according to the detected external condition and a second functional relationship.
According to at least one embodiment of the present disclosure, further comprising:
the first analog-to-digital conversion module is used for acquiring a first adjustment voltage, performing analog-to-digital conversion on the first adjustment voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring a second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing the converted first digital signal to the control module.
According to at least one embodiment of the present disclosure, the first analog-to-digital conversion module and the second analog-to-digital conversion module use the third voltage as a target voltage so as to convert the first adjustment voltage into a first digital signal and convert the second adjustment voltage into a second digital signal.
According to at least one embodiment of the present disclosure, the voltage regulator further includes a function establishing module that obtains a functional relationship between the external condition and the first voltage and a functional relationship between the external condition and the second voltage by obtaining a change in the first voltage and the second voltage under different external conditions.
According to at least one embodiment of the present disclosure, further comprising:
the first analog-to-digital conversion module is used for acquiring a first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the function establishment module; and
and the second analog-to-digital conversion module is used for acquiring a second voltage, performing analog-to-digital conversion on the second voltage and providing the converted first digital signal to the function establishment module.
According to at least one embodiment of the present disclosure, the first analog-to-digital conversion module and the second analog-to-digital conversion module are supplied with a target voltage so as to convert the first voltage and the second voltage into a first digital signal and a second digital signal, respectively, according to the target voltage.
According to at least one embodiment of the present disclosure, the first voltage generated by the first voltage generation module and the second voltage generated by the second voltage generation module are voltages that vary according to external conditions.
According to at least one embodiment of the present disclosure, the external condition is temperature, current and/or voltage.
According to at least one embodiment of the present disclosure, the first voltage is a positive temperature coefficient voltage and the second voltage is a negative temperature coefficient voltage, or
The first voltage is a positive current coefficient voltage and the second voltage is a negative current coefficient voltage, or
The first voltage is a positive voltage coefficient voltage and the second voltage is a negative voltage coefficient voltage.
According to at least one embodiment of the present disclosure, the first voltage generation module generates a negative temperature coefficient voltage, the first voltage generation module includes a current source and a triode, one end of the current source is connected to an external voltage, the other end of the current source can be connected to a collector of the triode, an emitter of the triode is grounded, a base of the triode is connected to the collector, and the first voltage is provided through the base of the triode.
According to at least one embodiment of the present disclosure, the first voltage generation module includes a negative temperature coefficient current source and a first resistor, one end of the negative temperature coefficient current source is connected to an external voltage, the other end of the negative temperature coefficient current source is connected to the first resistor, and a connection point of the negative temperature coefficient current source and the first resistor provides the first voltage; and
the second voltage generation module comprises a positive temperature coefficient current source and the first resistor, one end of the positive temperature coefficient current source is connected with an external voltage, the other end of the positive temperature coefficient current source is connected with the first resistor, and the second voltage is provided by the connection point of the positive temperature coefficient current source and the first resistor.
According to at least one embodiment of the present disclosure, in the first voltage generation block, a source of the first CMOS transistor is connected to a source of the second CMOS transistor, and a gate of the first CMOS transistor is connected to a gate of the second CMOS transistor, a drain of the first CMOS transistor is connected to an emitter of the first transistor, and a base and a collector of the first transistor are grounded,
in the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of a first resistor, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with the emitter electrode of a second triode, the base electrode and the collector electrode of the second triode are grounded,
the circuit further comprises a comparator, wherein two input ends of the comparator are respectively connected with a connection point of a drain electrode of the first CMOS transistor and an emitting electrode of the first triode and a connection point of the first resistor and the second resistor, and an output end of the comparator is connected with grids of the first CMOS transistor and the second CMOS transistor, so that voltage at two ends of the first resistor serves as second voltage, and voltage at two ends of the second resistor and the second triode serves as first voltage.
According to at least one embodiment of the present disclosure, in the first voltage generating module, an emitter of the first transistor is connected to one end of the first resistor, a base of the first transistor is connected to a collector and grounded, a connection point of the emitter of the first transistor and the first resistor is output as the first voltage,
in the second voltage generation module, an emitting electrode of a second triode is connected with one end of a third resistor, a base electrode of a first triode is connected with a collecting electrode and grounded, the other end of the third resistor is connected with one end of a second resistor, wherein the connection point of the second resistor and the third resistor is used as a second voltage output,
the voltage-controlled switch further comprises a comparator, two input ends of the comparator are respectively connected with a connection point of an emitting electrode of the first triode and the first resistor and a connection point of the second resistor and the third resistor, the output end of the comparator is connected with the other end of the first resistor and the other end of the second resistor, therefore, the voltage at two ends of the first resistor or the second resistor is used as second voltage, and the voltage at two ends of the first triode is used as first voltage.
According to at least one embodiment of the present disclosure, in the first voltage generation module, a source of the first CMOS transistor is connected to a source of the second CMOS transistor, and a gate of the first CMOS transistor is connected to a gate of the second CMOS transistor, a drain of the first CMOS transistor is connected to one end of the first resistor, and the other end of the first resistor is connected to a collector and a base of the first transistor, an emitter of the first transistor is grounded, one end of the second resistor may be connected to one end of the first resistor and the other end of the second resistor is grounded,
in the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of a third resistor and the base electrode and the collector electrode of the second triode, the other end of the third resistor is grounded, the emitter electrode of the second triode is grounded,
wherein, the device also comprises a comparator, two input ends of the comparator are respectively connected with the connection point of one end of the first resistor and one end of the second resistor and the connection point of one end of the third resistor and the base electrode and the collector electrode of the second triode, the output end of the comparator is connected with the grid electrodes of the first CMOS transistor and the second CMOS transistor,
the voltage-stabilizing circuit can further comprise a third CMOS transistor and a fourth resistor, wherein the source electrode of the third CMOS transistor is connected with the source electrode of the first CMOS transistor, the grid electrode of the third CMOS transistor is connected with the output end of the comparator, the drain electrode of the third CMOS transistor is connected with one end of the fourth resistor, and the other end of the fourth resistor is grounded, so that the voltage at two ends of the third resistor serves as the second voltage, and the voltage at any input end of the comparator serves as the first voltage.
According to at least one embodiment of the present disclosure, the first and second voltage generating modules include a first PNP transistor, a second PNP transistor, a first NPN transistor, a second NPN transistor, a third NPN transistor, a fourth NPN transistor, a first resistor, a second resistor, and a third resistor,
an emitting electrode of the first PNP type triode is connected with an emitting electrode of the second PNP type triode, a base electrode of the first PNP type triode is connected with a base electrode of the second PNP type triode and is connected with a collecting electrode of the second PNP type triode, a collecting electrode of the first PNP type triode is connected with a collecting electrode of the first NPN type triode, a collecting electrode of the second PNP type triode is connected with a collecting electrode of the second NPN type triode and is connected with base electrodes of the first NPN type triode and the second NPN type triode, an emitting electrode of the first NPN type triode is connected with a collecting electrode of the third NPN type triode and is connected with a base electrode of the fourth NPN type triode, an emitting electrode of the second NPN type triode is connected with one end of the second resistor through the third resistor, the other end of the second resistor is grounded, a voltage between the base electrode of the first NPN type triode and the emitting electrode of the fourth NPN type triode is used as a first voltage, and two ends of the second resistor are used as a second voltage.
According to at least one embodiment of the present disclosure, the first voltage generation module and the second voltage generation module include a current source circuit generating a current according to an external voltage and the generated current flows into a drain of a field effect transistor, a drain of the field effect transistor is connected to a gate of the field effect transistor and a source of the field effect transistor is grounded, wherein a gate-source voltage of the field effect transistor is represented as
Figure DEST_PATH_GWB0000003581120000061
V TH Is the threshold voltage of the field effect transistor, η is the sub-threshold slope of the field effect transistor, V T Is the thermal voltage of the field effect transistor, I is the current value provided by the current source circuit, mu is the electron mobility of the field effect transistor, cox is the gate oxide capacitance value of the field effect transistor, W/L is the width-to-length ratio of the field effect transistor, and/or>
Figure DEST_PATH_GWB0000003581120000071
Set to a second voltage, and V TH ≈V TH0 +(η-1)V SB Set to a first voltage.
According to at least one embodiment of the present disclosure, the first voltage is measured by setting the current generated by the current source circuit to be sufficiently small, and the second voltage is measured by subtracting the measured first voltage from the detected gate-source voltage with the current generated by the current source circuit set to be a normal current.
According to another aspect of the present disclosure, an electronic device includes a voltage generation unit as in any above, the voltage generation unit forming a reference voltage of the electronic device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 2 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 3 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 4 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 5 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 6 shows a schematic diagram of a voltage generation unit according to an embodiment of the present disclosure.
Fig. 7 shows a schematic diagram of a voltage generation module according to an embodiment of the present disclosure.
FIG. 8 shows a schematic diagram of a voltage generation module according to one embodiment of the present disclosure.
Fig. 9 shows a schematic diagram of a voltage generation module according to an embodiment of the present disclosure.
FIG. 10 shows a schematic diagram of a voltage generation module according to one embodiment of the present disclosure.
FIG. 11 shows a schematic diagram of a voltage generation module according to one embodiment of the present disclosure.
Fig. 12 shows a schematic diagram of a voltage generation module according to an embodiment of the present disclosure.
FIG. 13 shows a schematic diagram of a voltage generation module according to one embodiment of the present disclosure.
FIG. 14 shows a schematic view of an electronic device according to an embodiment of the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically connected, electrically connected, and the like, with or without intervening components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below," in.. Below, "" above, "" upper, "" above, "" higher, "and" side (e.g., as in "side walls") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
According to one embodiment of the present disclosure, there is provided a voltage generation unit that can provide an accurate reference voltage.
Fig. 1 illustrates a voltage generation unit according to one embodiment of the present disclosure.
As shown in fig. 1, the voltage generating unit may include a first voltage generating module 11, a first analog-to-digital converting module 12, a second voltage generating module 21, a second analog-to-digital converting module 22, a second multiplying module 23, a coefficient adjusting module 24, an adding module 30, and a control module 40.
The first voltage generation module 11 may be used to generate a first voltage V 1 And the first voltage V 1 Is provided to the first analog-to-digital conversion block 12.
The first analog-to-digital conversion module 12 is configured to receive the first voltage and perform analog-to-digital conversion on the first voltage, so as to convert the first digital signal D 1 To the control module 40.
The second voltage generation module 21 may be used to generate the second voltage V 2 And the second voltage V 2 Is supplied to a second multiplying module 23 which receives a second voltage V 2 And an adjusted coefficient of the coefficient M of the coefficient adjustment module 24 and to sum the adjusted coefficient with the second voltage V 2 And multiplying to obtain a second regulated voltage.
The second analog-to-digital conversion module 22 is configured to receive the second adjustment voltage and perform analog-to-digital conversion on the adjustment voltage, so as to convert the second digital signal D 2 To the control module 40.
The control module receives the first digital signal and the second digital signal and controls the coefficient adjustment module 24 to adjust the coefficient according to the first digital signal and the second digital signal.
Wherein the adding module 30 may be configured to add the first voltage and the second adjustment voltage and obtain an added voltage V BG . The voltage V BG May be used as a reference voltage.
In addition, the voltage V BG Also provided to the first and second analog-to-digital conversion modules 12 and 22, the voltage V can be converted BG As the benchmarking voltages of the first analog-to-digital conversion module 12 and the second analog-to-digital conversion module 22. The first analog-to-digital conversion module 12 generates a first digital signal D by comparing the first voltage with the target voltage 1 The second analog-to-digital conversion module 22 generates a second digital signal D by comparing the second adjustment voltage with the benchmarking voltage 2 。
The adjustment coefficient M will be described in detail below by way of example. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 11 and the second voltage generation module 21 will change along with the change of the external condition along with the change of the time. If the first voltage and/or the second voltage are not adjusted, the reference voltage V BG Variations will be made.
The following description will be made by taking a first time T0 and a second time T1 as an example, wherein the time difference between the first time T0 and the second time T1 is preferably in milliseconds in the present disclosure.
At a first time T0, adjusting the value of the first coefficient M, so that the output voltage V of the addition module at the first time T0 BG(T0) Is a first reference voltage value V R For example, the first reference voltage value may be equal to 1.24V, etc., and in the present disclosure, the specific voltage value is not specifically limited, and is used only for example.
At a first time T0, a first voltage V is respectively measured and obtained by using a first analog-to-digital conversion module and a second analog-to-digital conversion module 1(T0) And a second regulated voltage M V 2(T0) 。
Respectively measuring a first voltage V by using a first analog-to-digital conversion module and a second analog-to-digital conversion module 1(T0) And a second regulated voltage M V 2(T0) Thus, the first voltage V can be obtained through the analog-to-digital conversion module 1(T0) First digital signal D of 1(T0) And a second regulated voltage M V 2(T0) Second digital signal D 2(T0) 。
In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage V BG(T0) 。
Wherein D is 1(T0) May be equal to V 1(T0) /V BG(T0) . Wherein V BG(T0) The voltage output by the adding module at the first time T0. D 2(T0) May be equal to M V 2(T0) /V BG(T0) 。
Thus, M V 2(T0) /V 1(T0) ＝D 2(T0) /D 1(T0) ＝x 0 。
At this time, V 1(T0) ＝V BG(T0) *1/(1+x 0 )，M*V 2(T0) ＝V BG(T0) *x 0 /(1+x 0 )。
At a second time T1 (the second time T1 is a time after the first time T0), the first voltage V is measured by the first analog-to-digital conversion module and the second analog-to-digital conversion module respectively 1(T1) And a second regulated voltage V 2(T1) Thus, the first voltage V can be obtained by the analog-to-digital conversion unit 1(T1) First digital signal D of 1(T1) And a second adjustment voltage M V 2(T1) Second digital signal D 2(T1) 。
In addition, in the present disclosure, the output voltage of the addition module at the second time T1 is also measured, thereby obtaining the reference voltage V BG(T1) 。
Wherein D is 1(T1) May be equal to V 1(T1) /V BG(T1) . Wherein V BG(T1) The voltage output by the addition module at the second time T1. D 2(T1) May be equal to M V 2(T1) /V BG(T1) 。
Thus M V 2(T1) /V 1(T1) ＝D 2(T1) /D 1(T1) ＝x 1 。
At this time, V 1(T1) ＝V BG(T1) *1/(1+x 1 )，M*V 2(T1) ＝V BG(T1) *x 1 /(1+x 1 )。
From the first time T0 to the second time T1, the second adjusting voltage M V 2 Change value Δ (M V) 2 )＝M*V 2(T1) -M*V 2(T0) . I.e. equal to V BG(T1) *x 1 /(1+x 1 )-V BG(T0) *x 0 /(1+x 0 )。
From a first time T0 to a second time T1, a first voltage V 1 Change value Δ V of 1 ＝M*V 1(T1) -M*V 1(T0) I.e. equal to V BG(T1) *x 0 /(1+x 0 )-V BG(T0) *x 0 /(1+x 0 )。
In the present disclosure, by the second adjustment voltage M V 2 Change value Δ (M V) 2 ) And a first voltage V 1 Change value Δ V of 1 The difference between the reference voltages is zero to eliminate the variation of the reference voltage generated by the addition module due to the change of the external condition. Thus, Δ (M V) 2 ) Must be equal to Δ V 1 。
Then V BG(T1) Must be equal to V BG(T0) ，V BG Just can not receiveTo the effects of changes in external conditions.
It is assumed here first that V BG(T1) Equal to a first reference voltage, e.g. 1.24V, then V BG(T1) ＝1.24。
Test 1.24 × x 1 /(1+x 1 )-1.24*x 0 /(1+x 0 ) Absolute value of |1.24 × x 1 /(1+x 1 )-1.24*x 0 /(1+x 0 ) L ("second absolute value" hereinafter).
If the second absolute value is equal to 1.24 x 1/(1 + x) 1 )-1.24*1/(1+x 0 ) Absolute value of |1.24 x 1/(1 + x) 1 )-1.24*1/ (1+x 0 ) L (hereinafter referred to as a first absolute value). Then, V BG(T1) Is equal to V BG(T0) I.e. equal to 1.24V.
If the second absolute value is greater than the first absolute value, Δ (M V) 2 ) Greater than Δ V 1 Then the first coefficient M is adjusted so that the first coefficient M becomes M- Δ M. This will form V BG(T1) -ΔM*V 2(T1) 。
Measuring a second regulated voltage (M- Δ M) V again using a second analog-to-digital conversion module 2(T1) The digital output of the second analog-to-digital conversion module is (M-Delta M) V 2(T1) /V BG(T1) ＝(M-ΔM)*V 2(T1) /V 1(T1) ＝x 1 ’。
The verification was performed again, examining |1.24 × x 1 ’/(1+x 1 ’)-1.24*x 0 /(1+x 0 ) Whether | is greater than |1.24 x 1/(1 + x) 1 ’)-1.24* 1/(1+x 0 )|。
If so, (M- Δ M) is again decreased by Δ M, corresponding to (M-2 × Δ M).
If so, the effect due to the change in external conditions is considered to have been eliminated.
Wherein in case of this greater, the verification is continued and the Δ M is continued to be reduced depending on the result. Until a situation arises.
If |1.24 x 1 ’/(1+x 1 ’)-1.24*x 0 /(1+x 0 ) I is less than |1.24 x 1/(1 + x) 1 ’)-1.24*1/(1+x 0 ) L, illustrate Δ (M V) 2 ) Less than Δ V 1 . The first coefficient M is adjusted so that the first coefficient M becomes M + Δ M. Thus, V will be formed BG(T1) + ΔM*V 2(T1) 。
Measuring a second regulated voltage (M + Δ M) V again using the second analog-to-digital conversion module 2(T1) The digital output of the second analog-to-digital conversion module is (M + delta M) × V 2(T1) /V BG(T1) ＝(M+ΔM)*V 2(T1) /V 1(T1) ＝x 1 ’。
The verification was performed again, examining |1.24 × x 1 ’/(1+x 1 ’)-1.24*x 0 /(1+x 0 ) Whether | is less than |1.24 x 1/(1 + x) 1 ’)-1.24* 1/(1+x 0 )|。
If less, then (M + Δ M) is increased by Δ M again, corresponding to (M +2 × Δ M). Until a situation arises.
Fig. 2 illustrates a voltage generation unit according to an embodiment of the present disclosure.
As shown in fig. 2, the voltage generating unit may include a first voltage generating module 11, a first analog-to-digital converting module 12, a first multiplying module 13, a first coefficient adjusting module 14, a second voltage generating module 21, a second analog-to-digital converting module 22, a second multiplying module 23, a coefficient adjusting module 24, an adding module 30, and a control module 40.
The first voltage generation module 11 may be used to generate a first voltage V 1 And the first voltage V 1 Is supplied to a first multiplying module 13 which receives a first voltage V 1 And an adjusted coefficient of the coefficient N of the first coefficient adjustment module 14 and comparing the adjusted coefficient with the first voltage V 1 The first and second adjustment voltages are multiplied to obtain a first adjustment voltage.
The first analog-to-digital conversion module 12 is configured to receive the first voltage and perform analog-to-digital conversion on the first voltage, so as to convert the first digital signal D 1 To the control module 40.
The second voltage generation module 21 may be used to generate the second voltage V 2 And the second voltage V 2 Is supplied to a second multiplying module 23 which receives a second voltage V 2 And the adjustment of the coefficient M of the second coefficient adjustment module 24The adjusted coefficient is adjusted and is connected with the second voltage V 2 And multiplying to obtain a second regulated voltage.
The second analog-to-digital conversion module 22 is configured to receive the second adjustment voltage and perform analog-to-digital conversion on the adjustment voltage, so as to convert the second digital signal D 2 To the control module 40.
The control module 40 receives the first digital signal and the second digital signal and controls the coefficient adjustment module 24 to adjust the coefficient according to the first digital signal and the second digital signal.
Wherein the adding module 30 can be used for adding the first adjustment voltage and the second adjustment voltage and obtaining an added voltage V BG . The voltage V BG May be used as a reference voltage.
In addition, the voltage V BG Also provided to the first and second analog-to-digital conversion modules 12 and 22, the voltage V can be converted BG As the benchmarking voltages of the first analog-to-digital conversion module 12 and the second analog-to-digital conversion module 22. The first analog-to-digital conversion module 12 generates a first digital signal D by comparing the first adjustment voltage and the target voltage 1 The second analog-to-digital conversion module 22 generates a second digital signal D by comparing the second adjustment voltage with the benchmarking voltage 2 。
The adjustment coefficient M will be described in detail below by way of example. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 11 and the second voltage generation module 21 will change along with the change of the external condition along with the change of the time. If the first voltage and/or the second voltage are not adjusted, the reference voltage V BG Variations will be made.
In the embodiment with reference to fig. 1, only the case of adjusting one coefficient is described, and the case of adjusting two coefficients may be adopted as follows.
At a first time T0, adjusting the value of the first coefficient M and/or the value of the second coefficient N, so that the output voltage V of the adding unit at the first time T0 BG(T0) Is a first reference voltage value V R For example, the first reference voltage value may be equal to 1.24V or the likeIn the present disclosure, the specific voltage value is not specifically limited, and is only used as an example.
At a first time T0, a first voltage V is respectively measured and obtained by using a first analog-to-digital conversion module and a second analog-to-digital conversion module 1(T0) First adjusting voltage N V 1(T0) And a second voltage V 2(T0) Second adjustment voltage M V 2(T0) 。
Respectively measuring a first regulated voltage N V by using a first analog-to-digital conversion module and a second analog-to-digital conversion module 1(T0) And a second regulated voltage M V 2(T0) Thus, the first adjustment voltage N x V can be obtained by the analog-to-digital conversion unit 1(T0) First digital signal D of 1(T0) And a second adjustment voltage M V 2(T0) Second digital signal D 2(T0) 。
In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage V BG(T0) 。
Wherein D is 1(T0) May be equal to N x V 1(T0) /V BG(T0) . Wherein V BG(T0) The voltage output by the adding module at the first time T0. D 2(T0) May be equal to M V 2(T0) /V BG(T0) 。
Thus, M V 2(T0) /(N*V 1(T0) )＝D 2(T0) /D 1(T0) ＝x 0 。
At this time, N is V 1(T0) ＝V BG(T0) *1/(1+x 0 )，M*V 2(T0) ＝V BG(T0) *x 0 /(1+x 0 )。
At a second time T1 (the second time T1 is a time after the first time T0), the first analog-to-digital conversion module and the second analog-to-digital conversion module are respectively used for measuring a first adjustment voltage N x V 1(T0) And a second regulated voltage M V 2(T1) Thus, the first adjustment voltage N x V can be obtained by the analog-to-digital conversion unit 1(T0) First digital signal D of 1(T1) And a second adjustment voltage M V 2(T1) Second digital signal D 2(T1) 。
Also, at a second time T1 in this disclosureThe output voltage of the summing block is also measured, resulting in a reference voltage V BG(T1) 。
Wherein D is 1(T1) May be equal to N V 1(T1) /V BG(T1) . Wherein V BG(T1) The voltage outputted by the adding module at the second time T1. D 2(T1) May be equal to M x V 2(T1) /V BG(T1) 。
Thus M V 2(T1) /N*V 1(T1) ＝D 2(T1) /D 1(T1) ＝x 1 。
At this time, N is V 1(T1) ＝V BG(T1) *1/(1+x 1 )，M*V 2(T1) ＝V BG(T1) *x 1 /(1+x 1 )。
When the first adjustment voltage and the second adjustment voltage change from the first time T0 to the second time T1, the adjustment can be performed by referring to the same principle as the embodiment shown in fig. 1, and details thereof are not repeated. For example, in the case of adjusting the coefficient M in the above embodiment, for example, such that the first coefficient M becomes M + Δ M, these manners may be adopted in this manner: 1. adjust only the first coefficient M to M + Δ M,2 adjust only the second coefficient N to N- Δ N, or 3 adjust both the first coefficient M and the second coefficient N such that M + Δ M, and N- Δ N. These methods can be used for adjustment again.
In the present disclosure, the external condition may be temperature, voltage, and/or current, etc. For example, when the external condition changes to a temperature change, the first voltage generation module may be a negative temperature coefficient voltage generation module, and the first voltage V 1 May be a negative temperature coefficient voltage V be . The negative temperature coefficient voltage may be a base-emitter voltage of an NPN triode, a base-emitter voltage of a PNP triode, or a PN junction voltage of a diode. Also the gate-source voltage V of the MOSFET GS Or threshold voltage V of MOSFET TH 。
The second voltage generation module may be a positive temperature coefficient voltage generation module, and the second voltage V2 may be a positive temperature coefficient voltage V PTAT . The positive temperature coefficient voltage is increased with the temperatureA PTAT voltage (proportionality To Absolute Temperature voltage). Wherein the PTAT voltage may be implemented by a PTAT voltage generation circuit. That is, the negative temperature coefficient voltage refers to a voltage that decreases with an increase in temperature, and the positive temperature coefficient voltage refers to a voltage that increases with an increase in temperature.
In addition, when the first voltage generation module and the second voltage generation module generate voltages, external voltage sources or current sources are bound to be provided, and the different values provided by the external voltage sources or current sources can cause the voltage generated by the first voltage generation module and the second voltage generation module to fluctuate.
Embodiments according to the present disclosure will be more efficient and more accurate than the way the voltage is generated by hardware. Meanwhile, the influence of first-order change of the first voltage and the second voltage can be eliminated, and the influence caused by high-order change can also be eliminated. Furthermore, according to the embodiments of the present disclosure, regardless of how much the initial reference voltage (the voltage output by the addition module) deviates, it can finally generate a stable desired reference voltage because of the determination method of the ratio it adopts.
Fig. 3 illustrates a voltage generation unit according to an embodiment of the present disclosure.
As shown in fig. 3, the voltage generating unit may include a first voltage generating module 110, a first voltage adjusting module 111, a first analog-to-digital converting module 112, a second voltage generating module 120, a second voltage adjusting module 121, a second analog-to-digital converting module 122, and an adding module 130.
The first voltage generating module 110 may be configured to generate a first voltage V1, and the first voltage V1 is provided to the first voltage adjusting module 111.
The first voltage adjusting module 111 is used for adjusting the first voltage V1 to generate an adjusted voltage. For example, the first voltage adjustment module 111 may multiply the first voltage V1 by a coefficient M to generate the adjustment voltage M × V1. The first voltage adjustment module 111 obtains a voltage value of the adjustment voltage by adjusting the coefficient M. Wherein the adjustment coefficient M may vary in a stepwise manner.
The first analog-to-digital conversion module 112 is configured to receive the first adjustment voltage and perform analog-to-digital conversion on the first adjustment voltage, so as to provide the converted first digital signal D1 to the first voltage adjustment module 111, and the first voltage adjustment module 111 may adjust the first voltage V1 according to the digital signal D1, for example, when the adjustment is performed by using a coefficient M, the coefficient may be adjusted to achieve the purpose of adjusting the first voltage V1.
The second voltage generating module 120 may be configured to generate a second voltage V2, and the second voltage V1 is provided to the second voltage adjusting module 121.
The second voltage adjusting module 121 is configured to adjust the second voltage V2 to generate a second adjusted voltage. For example, the second voltage adjustment module 121 may multiply the second voltage V2 by a coefficient N to generate the adjustment voltage N × V2. The second voltage adjustment module 121 obtains a voltage value of the adjustment voltage by adjusting the coefficient N. Wherein the adjustment factor N may vary in a step-like manner.
The second analog-to-digital conversion module 122 is configured to receive the adjustment voltage and perform analog-to-digital conversion on the adjustment voltage, so as to provide the converted second digital signal D2 to the second voltage adjustment module 121, and the second voltage adjustment module 121 may adjust the second voltage V2 according to the digital signal D2, for example, when the adjustment is performed by using a coefficient N, the coefficient may be adjusted to achieve the purpose of adjusting the second voltage V2.
The adding module 130 may be configured to add the first adjustment voltage and the second adjustment voltage, and obtain an added voltage VBG. The voltage VBG may serve as a reference voltage.
The voltage VBG is further provided to the first analog-to-digital conversion module 112 and the second analog-to-digital conversion module 122, and the voltage VBG can be used as a target voltage of the first analog-to-digital conversion module 112 and the second analog-to-digital conversion module 122. The first analog-to-digital conversion module 112 generates a first digital signal D1 by comparing the first adjustment voltage and the target voltage, and the second analog-to-digital conversion module 122 generates a second digital signal D2 by comparing the second adjustment voltage and the target voltage.
The adjustment coefficients M,N is an example to explain details. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 110 and the second voltage generation module 120 will change along with the change of the external condition. If the first voltage and/or the second voltage are not adjusted, the reference voltage V BG Variations will be made.
The following description will be made by taking a first time T0 and a second time T1 as an example, wherein the time difference between the first time T0 and the second time T1 is preferably in milliseconds in the present disclosure.
From the first time T0 to the second time T1, the voltage value of the first adjustment voltage at the second time T1 will be M V 1(T1) ＝ M*(V 1(T0) +ΔV 1 ) In which V is 1(T1) Is a first voltage value, V, at a second time T1 1(T0) Is the first voltage value at the first time T0.
From the first time T0 to the second time T1, the voltage value of the second adjustment voltage at the second time T1 will be N x V 2(T1) ＝ N*(V 2(T0) +ΔV 2 ) In which V is 2(T1) A second voltage value, V, at a second time T1 2(T0) The second voltage value is the first time T0.
The output D of the first analog-to-digital conversion module 112 1 ＝M*V 1(T1) /V BG(T1) ＝M*V 1(T0) /V BG(T1) +M*ΔV 1 / V BG(T1) . Wherein V BG(T1) May be the output of the summing block 130 at the second time T1. In addition, V BG(T1) Other reference voltages may be used instead, and for example, a constant voltage may be used as the reference voltage. The reference voltage may be output from the addition module at another timing such as the first timing. The output D2= N V of the second analog-to-digital conversion module 122 2(T1) /V BG(T1) ＝N*V 2(T0) /V BG(T1) +N*ΔV 2 /V BG(T1) . Wherein V BG(T1) May be the output of the summing block 130 at the second time T1. In addition, V BG(T1) Other reference voltages may be used instead, and for example, a constant voltage may be used as the reference voltage. In addition, can alsoThe reference voltage is taken by the output of the addition module at other times, such as the first time.
According to the embodiment of fig. 6, the first voltage may be adjusted by the detected value of the first adjustment voltage. After the voltage generation unit operates, for example, after it operates stably, it is desirable that the voltage value output therefrom be a stable reference voltage value. Continuing with the description of the example of two times, of the first time T0 and the second time T1, the first adjustment voltage at the first time is V 1(T0) The first regulation voltage at the second moment is V 1(T1) . When the second time is reached, the digital signal D of the first analog-to-digital conversion module 112 1 The first regulated voltage at the second moment is V 1(T1) At this time, when the third time T2 is reached, the first voltage adjustment module 111 sets the generated first adjustment voltage at the third time to V 1(T2) Comparing the first regulated voltage V 1(T2) And a first regulated voltage of V 1(T1) And if the difference exists between the first voltage and the second voltage, the first voltage adjusting module is used for avoiding the change of the first adjusting voltage.
The second voltage may be adjusted by a detected value of the second adjustment voltage. After the voltage generation unit operates, for example, after it operates stably, it is desirable that the voltage value output therefrom be a stable reference voltage value. Continuing with the description of the example of two times, in the first time T0 and the second time T1, the second adjustment voltage at the first time is V 2(T0) The second regulation voltage at the second moment is V 2(T1) . When the second time arrives, the digital signal D of the second analog-to-digital conversion module 122 1 A second regulated voltage V representing a second time 2(T1) When the third time T2 is reached, the second voltage adjustment module 121 sets the generated second adjustment voltage at the third time to V 2(T2) Comparing the first regulated voltage V 2(T2) And a second regulated voltage of V 2(T1) And if the difference exists between the first voltage and the second voltage, the first voltage adjusting module is used for avoiding the change of the second adjusting voltage.
Further, it may be adjusted according to establishing a functional relationship between external conditions and voltage changes.
FIG. 4 shows a schematic diagram of establishing functional relationships according to one embodiment of the present disclosure.
As shown in fig. 4, a first voltage generation module 210, a first analog-to-digital conversion module 211, a second voltage generation module 220, a second analog-to-digital conversion module 221, and a function establishment module 230 may be included.
The first voltage generation module 210 may be used to generate a first voltage V 1 And the first voltage V 1 Is provided to the first analog-to-digital conversion module 211.
The first analog-to-digital conversion module 211 is configured to receive the first voltage and perform analog-to-digital conversion on the first voltage, so as to convert the first digital signal D 1 Is provided to the function creation module 230.
The second voltage generation module 120 may be used to generate a second voltage V 2 And the second voltage V 1 Is provided to the second analog-to-digital conversion module 221.
The second analog-to-digital conversion module 122 is configured to receive the second voltage and perform analog-to-digital conversion on the second voltage, so as to convert the second digital signal D 2 Is provided to the function creation module 230.
The functional relationship between the external condition and the first and second voltages is obtained by varying the external condition, for example, during a test phase. The external condition may be, for example, various parameters such as temperature, voltage, current, and the like. The following description is given by taking temperature as an example, and the first voltage V can be measured under different temperature conditions 1 And a second voltage V 2 The corresponding voltage values are then fitted to the temperature as a function of the first voltage and to the temperature as a function of the second voltage.
FIG. 5 shows a schematic diagram of voltage regulation by functional relationship according to one embodiment of the present disclosure.
After the functional relationship is established by the embodiment shown in fig. 4, it can be used during use of the voltage generating unit. It should be noted that fig. 4 and fig. 5 may be combined together, that is, the first voltage generation module and the second voltage generation module may be the same in fig. 4 and fig. 5.
As shown in fig. 5, the voltage generation unit may include a first voltage generation module 210, a first voltage adjustment module 212, a second voltage generation module 220, a second voltage adjustment module 222, an addition module, a control module 250, and a detection module 260.
The first voltage generation module 210 may be used to generate a first voltage V 1 And the first voltage V 1 To the first voltage adjustment module 212.
The first voltage adjusting module 212 is used for adjusting the first voltage V 1 To generate the regulated voltage. For example, the first voltage adjusting module 111 may adjust the first voltage V 1 Multiplying by a factor M to generate an adjusted voltage M V 1 . The first voltage adjustment module 111 obtains a voltage value of the adjustment voltage by adjusting the coefficient M. Wherein the adjustment coefficient M may vary in a stepwise manner.
The second voltage generation module 220 may be used to generate a second voltage V 2 And the second voltage V 2 To the second voltage adjustment module 222.
The second voltage adjusting module 222 is used for adjusting the second voltage V 2 To generate a second regulated voltage. For example, the second voltage adjustment module 222 may adjust the second voltage V 2 Multiplying by a factor N to generate an adjusted voltage N V 2 . The second voltage adjustment module 222 obtains the voltage value of the adjustment voltage by adjusting the coefficient N. Wherein the adjustment factor N may be varied in a stepwise manner.
The addition module 240 may receive the first adjustment voltage and the second adjustment voltage and add the first adjustment voltage and the second adjustment voltage to obtain a reference voltage V BG 。
The detecting module 260 may detect the external condition, for example, if the external condition is temperature, the detecting module 260 may be a temperature sensor, the temperature sensor may detect the temperature in real time, the control module 250 may obtain the temperature detected by the temperature sensor and obtain a corresponding expected voltage value according to the detected temperature and a previously established functional relationship, and the control module 250 may control the detecting module 250 according to the expected voltage valueThe first voltage adjustment module 212 and the second voltage adjustment module 222 adjust the first adjustment voltage and the second adjustment voltage. Thereby avoiding the reference voltage V BG Subject to external conditions.
Fig. 6 illustrates a voltage generation unit according to an embodiment of the present disclosure.
As shown in fig. 6, the voltage generating unit may include a first voltage generating module 410, a first voltage adjusting module 411, a first analog-to-digital converting module 412, a second voltage generating module 420, a second voltage adjusting module 421, a second analog-to-digital converting module 422, and an adding module 430.
The first voltage generation module 410 may be used to generate a first voltage V 1 And the first voltage V 1 To the first voltage adjustment module 411.
The first voltage adjusting module 411 is used for adjusting the first voltage V 1 To generate the regulated voltage. For example, the first voltage adjusting module 411 may adjust the first voltage V 1 Multiplying by a coefficient M to generate an adjustment voltage M V 1 . The first voltage adjustment module 411 obtains a voltage value of the adjustment voltage by adjusting the coefficient M. Wherein the adjustment coefficient M may vary in a stepwise manner.
The first analog-to-digital conversion module 412 is configured to receive the first adjustment voltage and perform analog-to-digital conversion on the first adjustment voltage, so as to convert the first digital signal D 1 Is provided to the first voltage adjusting module 411, and the first voltage adjusting module 411 can adjust the voltage according to the digital signal D 1 To adjust the first voltage V 1 For example, when the adjustment is performed by using the coefficient M, the coefficient can be adjusted to adjust the first voltage V 1 The purpose of (1).
The second voltage generation module 420 may be used to generate a second voltage V 2 And the second voltage V1 is provided to the second voltage adjusting module 421.
The second voltage adjusting module 421 is used for adjusting the second voltage V 2 To generate a second regulated voltage. For example, the second voltage adjusting module 421 can adjust the second voltage V 2 Multiplying by a factor N to generate an adjusted voltage N V 2 . The second voltage adjustment module 421The coefficient N is adjusted to obtain the voltage value of the adjustment voltage. Wherein the adjustment factor N may be varied in a stepwise manner.
The second analog-to-digital conversion module 422 is used for receiving the adjustment voltage and performing analog-to-digital conversion on the adjustment voltage, so as to convert the second digital signal D 2 Is provided to the second voltage adjusting module 421, and the second voltage adjusting module 421 can adjust the voltage according to the digital signal D 2 To adjust the second voltage V 2 For example, when the adjustment is performed by using the coefficient N, the coefficient can be adjusted to adjust the second voltage V 2 The purpose of (1).
The adding module 430 may be configured to add the first adjustment voltage and the second adjustment voltage, and obtain an added voltage V BG . The voltage V BG May be used as a reference voltage.
In addition, the voltage V BG Also provided to the first analog-to-digital conversion module 412 and the second analog-to-digital conversion module 422, the voltage V can be converted BG As the benchmarking voltages of the first analog-to-digital conversion module 412 and the second analog-to-digital conversion module 422. The first analog-to-digital conversion module 412 generates a first digital signal D by comparing the first adjustment voltage and the target voltage 1 The second analog-to-digital conversion module 422 generates a second digital signal D by comparing the second adjustment voltage with the benchmarking voltage 2 。
The adjustment coefficients M and N will be described in detail below as an example. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 410 and the second voltage generation module 420 may change along with the change of the external condition. If the first voltage and/or the second voltage are not adjusted, the reference voltage V BG Variations will be made.
The following description will be made by taking a first time T0 and a second time T1 as an example, wherein the time difference between the first time T0 and the second time T1 is preferably in milliseconds in the present disclosure.
From the first time T0 to the second time T1, the voltage value of the first adjustment voltage at the second time T1 will be M V 1(T1) ＝ M*(V 1(T0) +ΔV 1 ) In which V is 1(T1) Is a first voltage value, V, at a second time T1 1(T0) Is the first voltage value at the first time T0.
From the first time T0 to the second time T1, the voltage value of the second adjustment voltage at the second time T1 will be N x V 2(T1) ＝ N*(V 2(T0) +ΔV 2 ) In which V is 2(T1) A second voltage value, V, at a second time T1 2(T0) The second voltage value is the first time T0.
The output D1= M × V of the first analog-to-digital conversion module 412 1(T1) /VBG(T1)＝M*V 1(T0) /V BG(T1) +M*ΔV 1 / V BG(T1) . Wherein V BG(T1) May be the output of the summing module 430 at the second time T1. In addition, V BG(T1) Other reference voltages may be used instead, and for example, a constant voltage may be used as the reference voltage. The reference voltage may be output from the addition block at another timing such as the first timing. The output D of the second analog-to-digital conversion module 422 2 ＝N*V 2(T1) /V BG(T1) ＝N*V 2(T0) /V BG(T1) +N*ΔV 2 /V BG(T1) . Wherein V BG(T1) May be the output of the summing module 430 at the second time T1. In addition, V BG(T1) Other reference voltages may be used instead, and for example, a constant voltage may be used as the reference voltage. The reference voltage may be output from the addition module at another timing such as the first timing.
Thus Δ D 1 ≈M*ΔV 1 /V BG(T1) ≈M*V 1(T0) /V BG(T1) +M*ΔV 1 /V BG(T1) -M*V 1(T0) /V BG(T0) ；ΔD 2 ≈N*ΔV 2 /V BG(T1) ≈N*V 2(T0) /V BG(T1) +N*ΔV 2 /V BG(T1) -N*V 2(T0) /V BG(T0) 。
It is assumed that the change after compensation is small because V BG(T1) ≈V BG(T0) Therefore M x V 1(T0) /V BG(T1) -M*V 1(T0) /V BG(T0) ＝0，N*V 2(T0) /V BG(T1) -N*V 2(T0) /V BG(T0) ＝0。
So Δ D 1 ≈M*ΔV 1 /V BG(T1) ，ΔD 2 ≈N*ΔV 2 /V BG(T1) 。
To make V BG(T1) ＝V BG(T0) Then set | Δ D 1 |＝|ΔD 2 I, i.e.: | M Δ V 1 /V BG (T1)|＝|N*ΔV 2 /V BG(T1) |。
If after the measurement by the first and second analog-to- digital conversion modules 112 and 122, | M ×. DELTA.V 1 /V BG(T1) |＞ |N*ΔV 2 /V BG(T1) I, the first coefficient M is decreased and/or the second coefficient N is increased until M Δ V 1 /V BG(T1) |＝|N*ΔV 2 /V BG(T1) |。
If | M Δ V 1 /V BG(T1) |＜|N*ΔV 2 /V BG(T1) Increasing the first coefficient M and/or decreasing the second coefficient N until M Δ V 1 /V BG(T1) |＝|N*ΔV 2 /V BG(T1) |。
In the above embodiment, the reference voltage is generated by comparing the two adjustment voltages. The comparison may be performed by the control module 440, or may be performed by the comparison module.
Although described in the above description as a voltage adjustment module, the first voltage adjustment module and the second voltage adjustment module may be two modules, respectively, for example, in the case of a parameter adjustment, the two modules are a coefficient adjustment module in which a coefficient is adjusted and a multiplication module in which the adjusted coefficient is multiplied by the first/second voltage to obtain a corresponding adjustment voltage.
In the present disclosure, the external condition may be temperature, voltage, and/or current, etc. For example, when the external condition changes to a temperature change, the first voltage generation module may be a negative temperature coefficient voltage generation module, and the first voltage V1 may be a negative temperature coefficient voltage Vbe. The negative temperature coefficient voltage may be a base-emitter voltage of an NPN triode, a base-emitter voltage of a PNP triode, or a PN junction voltage of a diode. The gate-source VGS voltage of the MOSFET or the threshold voltage VTH of the MOSFET are also possible.
The second voltage generation module may be a positive temperature coefficient voltage generation module, and the second voltage V2 may be a positive temperature coefficient voltage VPTAT. The positive Temperature coefficient voltage is a PTAT voltage (proportionality To Absolute Temperature voltage) that increases with increasing Temperature. Wherein the PTAT voltage may be implemented by a PTAT voltage generation circuit. That is, the negative temperature coefficient voltage refers to a voltage that decreases with an increase in temperature, and the positive temperature coefficient voltage refers to a voltage that increases with an increase in temperature.
In addition, when the first voltage generation module and the second voltage generation module generate voltages, external voltage sources or current sources are bound to be provided, and the different values provided by the external voltage sources or current sources can cause the voltage generated by the first voltage generation module and the second voltage generation module to fluctuate.
Embodiments according to the present disclosure will be more efficient and more accurate than the way the voltage is generated by hardware. Meanwhile, the influence of first-order change of the first voltage and the second voltage can be eliminated, and the influence caused by high-order change can also be eliminated.
Fig. 7 shows a schematic diagram of a first voltage generation module according to an embodiment of the present disclosure. As shown in fig. 7, a first voltage V can be generated by a current source 701 and a transistor 702 1 May be a negative temperature coefficient voltage. Wherein one end of the current source 701 can be connected to the external voltage VCC, and the other end of the current source 701 can be connected to the collector of the transistor 702, while the emitter of the transistor 702 can be grounded, and the base of the transistor 702 is connected to the collector, so that the negative temperature coefficient voltage can be provided through the base of the transistor 702. In addition, the second voltage generated by the second voltage generation module may be a positive temperature coefficient voltage.
FIG. 8 shows a schematic representation of a system according to the present inventionSchematic diagrams of a first voltage generation module and a second voltage generation module of one embodiment of the disclosure are disclosed. Wherein the first voltage V 1 May be a negative temperature coefficient voltage and the second voltage may be a positive temperature coefficient voltage. The first voltage can be realized by a negative temperature coefficient current source 801 and a first resistor 803, and the second voltage V 2 This can be achieved by a positive temperature coefficient current source 802 and a first resistor 803, and further the first resistor and the second resistor can be two separate identical resistors. In the embodiment shown in fig. 8, the first voltage may be measured at a first time and the first voltage may be measured at a second time, for example in case of temperature for the external condition, the interval between the first time and the second time may be in the order of milliseconds, for example several milliseconds. In this way, the change value of the first voltage can be measured, the second voltage can be measured at the third time and the second voltage can be measured at the fourth time, and the interval between the third time and the fourth time can be in milliseconds, for example, several milliseconds. Thus, the variation value of the second voltage can be measured. In the manner described above, the reference voltage V is realized in accordance with the variation value of the first voltage (variation value) and/or the second voltage BG The stability of (2). For example by adjusting the current of the current source and/or the resistance of the first resistor.
Fig. 9 shows a schematic diagram of a first voltage generation module and a second voltage generation module according to one embodiment of the present disclosure. For the first voltage generation module, a first CMOS transistor (PMOS transistor) 911 and a first transistor 912 may be used, and for the second voltage generation unit, a second CMOS transistor (PMOS transistor) 921, a second transistor 922, a first resistor 923, and a second resistor 924 may be used.
In the first voltage generation module, a source of the first CMOS transistor may be connected to a source of the second CMOS transistor, a gate of the first CMOS transistor is connected to a gate of the second CMOS transistor, a drain of the first CMOS transistor is connected to an emitter of the first transistor, and a base and a collector of the first transistor are grounded.
In the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the emitter of the second triode, and the base electrode and the collector of the second triode are grounded.
A comparator 931 is further included, two input terminals of the comparator 931 are connected to a connection point of the drain of the first CMOS transistor and the emitter of the first transistor and a connection point of the first resistor and the second resistor, respectively, and an output terminal of the comparator 931 is connected to gates of the first CMOS transistor and the second CMOS transistor.
In the embodiment shown in fig. 9, the voltage across the first resistor 923 may be used as the second voltage, and the voltage across the second resistor and the second transistor may be used as the first voltage, so that by measuring the first voltage and the second voltage (the voltage values of the two voltages are transmitted to the analog-to-digital conversion unit), the voltage values of the generated first voltage and the second voltage may be adjusted according to the above-described manner of the present disclosure, so as to reach the stable reference voltage V BG 。
Fig. 10 shows a schematic diagram of a first voltage generation module and a second voltage generation module according to an embodiment of the present disclosure. The first voltage generation module may be implemented by using a first transistor 1011 and a first resistor 1012, and the second voltage generation unit may be implemented by using a second transistor 1021, a second resistor 1022, and a third resistor 1023.
In the first voltage generation module, an emitting electrode of a first triode is connected with one end of a first resistor, and a base electrode of the first triode is connected with a collecting electrode and grounded.
In the second voltage generation module, an emitting electrode of the second triode is connected with one end of the third resistor, a base electrode of the first triode is connected with a collecting electrode and grounded, and the other end of the third resistor is connected with one end of the second resistor. The amplifier further comprises a comparator 1031, two input ends of the comparator 1031 are respectively connected with a connection point of an emitter of the first triode and the first resistor and a connection point of the second resistor and the third resistor, and an output end of the comparator 1031 is connected with the other end of the first resistor and the other end of the second resistor.
In the embodiment shown in fig. 10, the voltage across the first resistor 1012 or the second resistor 1022 can be used as the second voltage, and the voltage across the first transistor 1011 can be used as the first voltage, so that by measuring the first voltage and the second voltage (the voltage values of the two voltages are transmitted to the analog-to-digital conversion unit), the voltage values of the generated first voltage and the second voltage can be adjusted according to the above-described manner of the present disclosure, so as to reach the stable reference voltage V BG 。
Fig. 11 shows a schematic diagram of a first voltage generation module and a second voltage generation module according to an embodiment of the present disclosure. For the first voltage generation block, a first CMOS transistor (PMOS transistor) 1114, a first resistor 1112, a second resistor 1113, and a first transistor 1111 may be used for implementation, and for the second voltage generation unit, a second CMOS transistor (PMOS transistor) 1123, a second transistor 1121, and a third resistor 1122 may be used for implementation.
In the first voltage generation block, a source of the first CMOS transistor may be connected to a source of the second CMOS transistor, and a gate of the first CMOS transistor is connected to a gate of the second CMOS transistor, a drain of the first CMOS transistor is connected to one end of the first resistor, and the other end of the first resistor is connected to a collector and a base of the first transistor, an emitter of the first transistor is grounded, and further, one end of the second resistor may be connected to one end of the first resistor and the other end of the second resistor is grounded. In the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of a third resistor and the base electrode and the collector electrode of the second triode, the other end of the third resistor is grounded, and the emitter electrode of the second triode is grounded.
The circuit further comprises a comparator 1131, two input ends of the comparator 1131 are respectively connected with a connection point of one end of the first resistor and one end of the second resistor, and a connection point of one end of the third resistor and a base and a collector of the second triode, and an output end of the comparator 1031 is connected with gates of the first CMOS transistor and the second CMOS transistor.
In addition, as shown in fig. 11, a third CMOS transistor (PMOS transistor) 1131 and a fourth resistor 1132 may be further included, where a source of the third CMOS transistor is connected to the source of the first CMOS transistor, a gate of the third CMOS transistor is connected to the output terminal of the comparator, a drain of the third CMOS transistor is connected to one end of the fourth resistor, and another end of the fourth resistor is grounded.
In the embodiment shown in fig. 11, the voltage across the third resistor 1122 can be used as the second voltage, and the voltage at any input terminal of the comparator can be used as the first voltage, so that by measuring the first voltage and the second voltage (the voltage values of the two voltages are transmitted to the analog-to-digital conversion unit), the voltage values of the generated first voltage and the second voltage can be adjusted according to the above-described manner of the present disclosure, so as to reach the stable reference voltage V BG 。
Fig. 12 shows a schematic diagram of a first voltage generation module and a second voltage generation module according to an embodiment of the present disclosure. The first voltage generation module and the second voltage generation module include a first PNP triode 1201, a second PNP triode 1202, a first NPN triode 1203, a second NPN triode 1204, a third NPN triode 1205, a fourth NPN triode 1206, a first resistor 1207, a second resistor 1208, and a third resistor 1209.
The emitting electrode of the first PNP type triode is connected with the emitting electrode of the second PNP type triode, and the base electrode of the first PNP type triode is connected with the base electrode of the second PNP type triode and is connected with the collecting electrode of the second PNP type triode. The collector of the first PNP type triode is connected with the collector of the first NPN type triode, the collector of the second PNP type triode is connected with the collector of the second NPN type triode and is connected with the bases of the first NPN type triode and the second NPN type triode, the emitter of the first NPN type triode is connected with the collector of the third NPN type triode and is connected with the base of the fourth NPN type triode, the emitter of the second NPN type triode is connected with one end of the first resistor, and the other end of the first resistor is connected with the collector of the fourth NPN type triode and the base of the third NPN type triode. An emitter of the third NPN type triode is connected with one end of the second resistor, an emitter of the fourth NPN type triode is connected with one end of the second resistor through the third resistor, the other end of the second resistor is grounded, and the third NPN type triode and the fourth NPN type triode are connected with one end of the second resistorThe voltage between the base of the first NPN type triode and the emitter of the fourth NPN type triode is used as the first voltage V 1 The voltage across the second resistor is taken as the second voltage V 2 。
Thus, by measuring the first voltage and the second voltage (the voltage values of the two voltages are fed to the analog-to-digital conversion unit), the voltage values of the generated first voltage and the second voltage can be adjusted in the manner described above according to the present disclosure, so as to reach the stable reference voltage V BG 。
Fig. 13 shows a schematic diagram of a first voltage generation module and a second voltage generation module according to one embodiment of the present disclosure.
In fig. 13, the current source circuit 1310 may be connected to an external voltage at one end, and may be connected to a drain of the field effect transistor 1320 at the other end, the drain of the field effect transistor 1320 may be connected to a gate, and the source of the field effect transistor 1320 may be connected to ground. By adjusting V of the field effect transistor 1320 GS (gate-source voltage) voltage to obtain an output voltage. Wherein the current source circuit 1310 may be any circuit generating current in the prior art.
In the case of the field effect transistor 1320,
Figure DEST_PATH_GWB0000003581120000161
wherein, V TH Is the threshold voltage of the field effect transistor, η is the sub-threshold slope of the field effect transistor, V T I is the thermal voltage of the fet, μ is the electron mobility of the fet, cox is the gate oxide capacitance of the fet, and W/L is the width to length ratio of the fet.
V TH ≈V TH0 +(η-1)V SB (formula 2) wherein V TH0 Is the zero-drift threshold voltage, V, of a field effect transistor SB Is the source-substrate voltage (the voltage between the source and the substrate) of the field effect transistor.
In the present disclosure, the above description can be passed throughThe voltage generation principle is that a first voltage and a second voltage are respectively obtained by a gate-source voltage of the field effect transistor 1320, wherein the second voltage can be as shown in formula 1
Figure DEST_PATH_GWB0000003581120000162
The first voltage may be V as shown in formula 1 TH ，
As can be seen from equation 2, V TH And V SB Correlation by adjusting V SB Can adjust V TH This allows the first voltage to be adjusted, while the second voltage is adjusted by adjusting the current provided by the current source circuit 1310.
In the embodiment shown in FIG. 13, the current source circuit 1310 may be first set to a very small (e.g., I/100 of the right) such that the second voltage is much smaller than the first voltage, and the first voltage V may be measured 1 . The current provided by the current source circuit 1310 may be set to the normal current I corresponding to the measurement of the first voltage, and the V of the field effect transistor 1320 may be obtained by the measurement GS And then subtracts the previously measured first voltage from it, so that a second voltage can be obtained. Thus, by measuring the first voltage and the second voltage (voltage values of the two voltages are fed into the analog-to-digital conversion unit), the voltage values of the generated first voltage and second voltage can be adjusted in the manner described above according to the present disclosure, so as to reach the stable reference voltage V BG . In this embodiment, this can be achieved by two identical current source circuits and two identical field effect transistors (as shown in fig. 13), and by one current source circuit and one field effect transistor (for example, first adjusting I to be sufficiently small, measuring the first voltage, then adjusting to I and deriving the second voltage from the subtraction).
In the specific circuit implementation of fig. 7 to 13, it is possible to select the first voltage and the second voltage to be measured, and to measure the first voltage and the second voltage and/or the variation thereof using the embodiment described in the above-mentioned fig. 1 to 6 according to the measurement manner of the selected first voltage and second voltage, such that the measured voltages are delivered to the analog-to-digital conversionIn the module, the first voltage and/or the second voltage are adjusted according to the method in fig. 1 to 6 (for example, the current of the current source or the corresponding resistance is adjusted), so that a stable reference voltage V can be obtained BG (sum of the first voltage and the second voltage), as can be seen from fig. 7 to 13, the addition module described in fig. 1 to 6 can be realized by the addition function of the circuit in fig. 7 to 13, and for fig. 7 to 13, the first voltage and the second voltage need to be extracted by the corresponding analog-to-digital conversion module, and then a stable reference voltage is obtained through feedback control.
According to a further embodiment of the present disclosure, there is also provided an electronic device, as shown in fig. 14, the voltage generated by the voltage generation voltage may power other components of the electronic device.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may be made to those skilled in the art, based on the above disclosure, and still be within the scope of the present disclosure.

Claims (42)

1. A voltage generation unit, comprising:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
a second voltage adjustment module for receiving the second voltage and adjusting the second voltage to output a second adjusted voltage;
a control module, which receives the first voltage and the second adjustment voltage, and controls a second voltage adjustment module to adjust the second voltage based on the information related to the first voltage and/or the information related to the second adjustment voltage; and
a summing module that receives the first voltage and a second adjusted voltage and generates a third voltage,
wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjusted voltage difference value at the two times.
2. The voltage generation unit of claim 1, further comprising:
the first analog-to-digital conversion module is used for acquiring the first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring the second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
3. The voltage generation unit of claim 2, wherein the first and second analog-to-digital conversion modules use the third voltage as a benchmarking voltage to convert the first voltage to a first digital signal and the second adjusted voltage to a second digital signal.
4. The voltage generation unit of claim 3, wherein the second voltage adjustment module includes a second coefficient adjustment module and a second multiplication module, the control module controls adjustment of the second coefficient, and the second multiplication module multiplies the adjusted second coefficient by the second voltage to obtain the second adjusted voltage.
5. The voltage generating unit of claim 4,
the control module judges whether a first difference value between a first digital signal of a first voltage at a first moment and a first digital signal of the first voltage at a second moment is equal to a second difference value between a second digital signal of a second adjustment voltage at the first moment and a second digital signal of the second adjustment voltage at the second moment, and adjusts the second coefficient if the first difference value is not equal to the second difference value.
6. The voltage generation unit of claim 5, wherein at the first time, the second coefficient is adjusted such that a third voltage at the first time is equal to a desired voltage.
7. The voltage generation unit of claim 5, wherein if the second difference is greater than the first difference, the second coefficient is decreased, and a second difference between a second digital signal of a second adjustment voltage generated based on the decreased second coefficient and a second digital signal of a second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal, the second coefficient is continuously decreased until the second difference is equal to the first difference.
8. The voltage generation unit of claim 5, wherein if the second difference is smaller than the first difference, the second coefficient is increased, and a second difference between a second digital signal of a second adjustment voltage generated based on the increased second coefficient and a second digital signal of a second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal, the second coefficient is continuously increased until the second difference is equal to the first difference.
9. The voltage generation unit of claim 4, further comprising: a first voltage adjusting module, wherein the first voltage adjusting module comprises a first coefficient adjusting module and a first multiplying module, the control module controls the adjustment of the first coefficient, the first multiplying module multiplies the adjusted first coefficient by the first voltage to obtain a first adjusted voltage, the first adjusted voltage is provided to the control module, and the control module controls the first voltage adjusting module and/or the second voltage adjusting module to adjust the first voltage and/or the second voltage based on the related information of the first adjusted voltage and/or the related information of the second adjusted voltage.
10. The voltage generating unit of claim 9,
the control module judges whether a first difference value between a first digital signal of a first adjustment voltage at a first moment and a first digital signal of the first adjustment voltage at a second moment is equal to a second difference value between a second digital signal of a second adjustment voltage at the first moment and a second digital signal of the second adjustment voltage at the second moment, and adjusts the first coefficient and/or the second coefficient if the first difference value is not equal to the second difference value.
11. The voltage generation unit of claim 10, wherein at the first time instant, the first coefficient and/or the second coefficient are adjusted such that a third voltage at the first time instant is equal to a desired voltage.
12. The voltage generation unit of claim 10, wherein if the second difference is greater than the first difference, the second coefficient is decreased and/or the first coefficient is increased, the first difference and the second difference are obtained again, and the first difference and the second difference are continuously compared, and if not equal, the second coefficient is decreased and/or the first coefficient is increased until the second difference is equal to the first difference.
13. The voltage generation unit of claim 10, wherein if the second difference is less than the first difference, increasing the second coefficient and/or decreasing the first coefficient, then obtaining the first difference and the second difference again, and continuing to compare the first difference and the second difference, if not equal, then continuing to increase the second coefficient and/or decrease the first coefficient until the second difference is equal to the first difference.
14. A voltage generation unit, comprising:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
a first voltage adjustment module to receive the first voltage and adjust the first voltage to output a first adjusted voltage;
a second voltage adjustment module for receiving the second voltage and adjusting the second voltage to output a second adjusted voltage;
a control module that receives the first adjustment voltage and the second adjustment voltage, and controls the first voltage adjustment module and/or the second voltage adjustment module to adjust the first voltage and/or the second voltage based on information about the first adjustment voltage and/or information about the second adjustment voltage; and
an addition module that receives the first and second adjusted voltages and generates a third voltage.
15. The voltage generation unit of claim 14, further comprising:
the first analog-to-digital conversion module is used for acquiring the first adjustment voltage, performing analog-to-digital conversion on the first adjustment voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring the second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
16. The voltage generation unit of claim 15, wherein the first and second analog-to-digital conversion modules use the third voltage as a benchmarking voltage to convert the first adjustment voltage to a first digital signal and the second adjustment voltage to a second digital signal.
17. The voltage generation unit of claim 15, wherein the first voltage adjustment module comprises a first coefficient adjustment module and a first multiplication module, the control module controls adjustment of the first coefficient, and the first multiplication module multiplies the adjusted first coefficient by the first voltage to obtain the first adjusted voltage; or
The second voltage adjusting module comprises a second coefficient adjusting module and a second multiplying module, the control module controls adjustment of the second coefficient, and the second multiplying module multiplies the adjusted second coefficient by the second voltage to obtain the second adjusting voltage.
18. The voltage generating unit of claim 15,
the control module controls the first voltage adjusting module according to a difference value between a first adjusting voltage at a second moment and a first voltage at a first moment to adjust the first voltage; or alternatively
The control module controls the second voltage adjusting module to adjust the second voltage according to a difference between a second adjustment voltage at a second time and a second voltage at a first time,
wherein the second time is a time after the first time.
19. The voltage generation unit of claim 18, wherein the control module controls based on a difference between the first adjusted voltage at the second time and the first voltage at the first time being equal to zero, or controls based on a difference between the second adjusted voltage at the second time and the second voltage at the first time being equal to zero.
20. The voltage generating unit of claim 15,
the first analog-to-digital conversion module receives a first adjustment voltage at a first moment and a first adjustment voltage at a second moment, obtains a first voltage change value according to the first adjustment voltage at the first moment and the first adjustment voltage at the second moment, and
the second analog-to-digital conversion module receives a second adjustment voltage at a first moment and a second adjustment voltage at a second moment, and obtains a second voltage change value according to the second adjustment voltage at the first moment and the second adjustment voltage at the second moment.
21. The voltage generation unit of claim 20, wherein the control module adjusts the first adjustment voltage and/or the second adjustment voltage based on a comparison of the first voltage change value and the second voltage change value.
22. The voltage generation unit of claim 21, wherein the control module adjusts the first voltage and/or the second voltage based on a difference between the first voltage change value and the second voltage change value being equal to zero.
23. The voltage generation unit of claim 21, wherein the first adjustment voltage is caused to increase and/or the second adjustment voltage is caused to decrease when a variation value of the first voltage is greater than the second voltage variation value.
24. The voltage generation unit of claim 14, wherein the control module adjusts the first voltage to obtain the first adjusted voltage based on a first functional relationship between an external condition and a first voltage generated by a first voltage generation module, and/or wherein the control module adjusts the first voltage to obtain the first adjusted voltage based on a second functional relationship between an external condition and a second voltage generated by a second voltage generation module.
25. The voltage generation unit of claim 24, further comprising a detection module for detecting the external condition to derive the first adjustment voltage based on the detected external condition and the first functional relationship and/or to derive the second adjustment voltage based on the detected external condition and the second functional relationship.
26. The voltage generation unit of claim 25, further comprising:
the first analog-to-digital conversion module is used for acquiring the first adjustment voltage, performing analog-to-digital conversion on the first adjustment voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring the second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing the converted first digital signal to the control module.
27. The voltage generation unit of claim 26, wherein the first and second analog-to-digital conversion modules use the third voltage as a benchmarking voltage to convert the first adjustment voltage to a first digital signal and the second adjustment voltage to a second digital signal.
28. The voltage generation unit of claim 25, further comprising a function establishment module that obtains a functional relationship of the external condition to the first voltage and a functional relationship of the external condition to the second voltage by obtaining a change in the first voltage and the second voltage under different external conditions.
29. The voltage generation unit of claim 28, further comprising:
the first analog-to-digital conversion module is used for acquiring the first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the function establishment module; and
and the second analog-to-digital conversion module is used for acquiring the second voltage, performing analog-to-digital conversion on the second voltage and providing the converted first digital signal to the function establishment module.
30. The voltage generation unit of claim 29, wherein the first and second analog-to-digital conversion modules are supplied with a target voltage to convert the first and second voltages into the first and second digital signals, respectively, according to the target voltage.
31. The voltage generation unit according to any one of claims 1 to 30, wherein the first voltage generated by the first voltage generation module and the second voltage generated by the second voltage generation module are voltages that vary depending on an external condition.
32. The voltage generating unit of claim 31, wherein the external condition is temperature, current, and/or voltage.
33. The voltage generating unit of claim 32,
the first voltage is a positive temperature coefficient voltage and the second voltage is a negative temperature coefficient voltage, or
The first voltage is a positive current coefficient voltage and the second voltage is a negative current coefficient voltage, or
The first voltage is a positive voltage coefficient voltage and the second voltage is a negative voltage coefficient voltage.
34. The voltage generating unit of claim 31,
the first voltage generation module generates negative temperature coefficient voltage, the first voltage generation module comprises a current source and a triode, one end of the current source is connected with external voltage, the other end of the current source can be connected with a collector of the triode, an emitter of the triode is grounded, a base of the triode is connected with the collector, and the base of the triode provides first voltage.
35. The voltage generating unit of claim 31,
the first voltage generation module comprises a negative temperature coefficient current source and a first resistor, one end of the negative temperature coefficient current source is connected with an external voltage, the other end of the negative temperature coefficient current source is connected with the first resistor, and the first voltage is provided by the connection point of the negative temperature coefficient current source and the first resistor; and
the second voltage generation module comprises a positive temperature coefficient current source and the first resistor, one end of the positive temperature coefficient current source is connected with an external voltage, the other end of the positive temperature coefficient current source is connected with the first resistor, and the second voltage is provided by the connection point of the positive temperature coefficient current source and the first resistor.
36. The voltage generating unit of claim 31,
in the first voltage generation module, the source electrode of the first CMOS transistor is connected with the source electrode of the second CMOS transistor, the grid electrode of the first CMOS transistor is connected with the grid electrode of the second CMOS transistor, the drain electrode of the first CMOS transistor is connected with the emitting electrode of the first triode, the base electrode and the collector electrode of the first triode are grounded,
in the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of a first resistor, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with the emitter electrode of a second triode, the base electrode and the collector electrode of the second triode are grounded,
the circuit further comprises a comparator, wherein two input ends of the comparator are respectively connected with a connection point of a drain electrode of the first CMOS transistor and an emitting electrode of the first triode and a connection point of the first resistor and the second resistor, and an output end of the comparator is connected with grids of the first CMOS transistor and the second CMOS transistor, so that voltage at two ends of the first resistor serves as second voltage, and voltage at two ends of the second resistor and the second triode serves as first voltage.
37. The voltage generating unit of claim 31,
in the first voltage generating module, an emitting electrode of a first triode is connected with one end of a first resistor, a base electrode of the first triode is connected with a collecting electrode and grounded, a connection point of the emitting electrode of the first triode and the first resistor is used as a first voltage output,
in the second voltage generation module, an emitting electrode of a second triode is connected with one end of a third resistor, a base electrode of a first triode is connected with a collecting electrode and grounded, the other end of the third resistor is connected with one end of a second resistor, wherein the connection point of the second resistor and the third resistor is used as a second voltage output,
the voltage-controlled switch further comprises a comparator, two input ends of the comparator are respectively connected with a connection point of an emitting electrode of the first triode and the first resistor and a connection point of the second resistor and the third resistor, the output end of the comparator is connected with the other end of the first resistor and the other end of the second resistor, therefore, the voltage at two ends of the first resistor or the second resistor is used as second voltage, and the voltage at two ends of the first triode is used as first voltage.
38. The voltage generating unit of claim 31,
in the first voltage generation module, a source of the first CMOS transistor is connected to a source of the second CMOS transistor, and a gate of the first CMOS transistor is connected to a gate of the second CMOS transistor, a drain of the first CMOS transistor is connected to one end of the first resistor, and the other end of the first resistor is connected to a collector and a base of the first transistor, an emitter of the first transistor is grounded, one end of the second resistor may be connected to one end of the first resistor and the other end of the second resistor is grounded,
in the second voltage generation module, the drain electrode of the second CMOS transistor is connected with one end of a third resistor and the base electrode and the collector electrode of the second triode, the other end of the third resistor is grounded, the emitter electrode of the second triode is grounded,
wherein, the device also comprises a comparator, two input ends of the comparator are respectively connected with the connection point of one end of the first resistor and one end of the second resistor and the connection point of one end of the third resistor and the base electrode and the collector electrode of the second triode, the output end of the comparator is connected with the grid electrodes of the first CMOS transistor and the second CMOS transistor,
the voltage-stabilizing circuit can further comprise a third CMOS transistor and a fourth resistor, wherein the source electrode of the third CMOS transistor is connected with the source electrode of the first CMOS transistor, the grid electrode of the third CMOS transistor is connected with the output end of the comparator, the drain electrode of the third CMOS transistor is connected with one end of the fourth resistor, and the other end of the fourth resistor is grounded, so that the voltage at two ends of the third resistor serves as a second voltage, and the voltage at any input end of the comparator serves as a first voltage.
39. The voltage generating unit of claim 31,
the first voltage generation module and the second voltage generation module comprise a first PNP type triode, a second PNP type triode, a first NPN type triode, a second NPN type triode, a third NPN type triode, a fourth NPN type triode, a first resistor, a second resistor and a third resistor,
an emitting electrode of the first PNP type triode is connected with an emitting electrode of the second PNP type triode, a base electrode of the first PNP type triode is connected with a base electrode of the second PNP type triode and is connected with a collecting electrode of the second PNP type triode, a collecting electrode of the first PNP type triode is connected with a collecting electrode of the first NPN type triode, a collecting electrode of the second PNP type triode is connected with a collecting electrode of the second NPN type triode and is connected with base electrodes of the first NPN type triode and the second NPN type triode, an emitting electrode of the first NPN type triode is connected with a collecting electrode of the third NPN type triode and is connected with a base electrode of the fourth NPN type triode, an emitting electrode of the second NPN type triode is connected with one end of the second resistor through the third resistor, the other end of the second resistor is grounded, a voltage between the base electrode of the first NPN type triode and the emitting electrode of the fourth NPN type triode is used as a first voltage, and two ends of the second resistor are used as a second voltage.
40. The voltage generation unit of claim 31, wherein the first voltage generation module and the second voltage generation module comprise a current source circuit and a field effect transistor,the current source circuit generates a current from an external voltage, and the generated current flows into a drain of a field effect transistor, which is connected to a gate of the field effect transistor and a source of the field effect transistor is grounded, wherein a gate-source voltage of the field effect transistor is represented as
Figure DEST_PATH_FDA0004041043000000051
V TH Is the threshold voltage of the field effect transistor, η is the sub-threshold slope of the field effect transistor, V T Is the thermal voltage of the field effect transistor, I is the current value provided by the current source circuit, mu is the electron mobility of the field effect transistor, cox is the gate oxide capacitance value of the field effect transistor, W/L is the width-to-length ratio of the field effect transistor,
Figure DEST_PATH_FDA0004041043000000052
set to a second voltage, and V TH ≈V TH0 +(η-1)V SB is set to the first voltage.
41. The voltage generation unit of claim 40, wherein the first voltage is measured by setting a current generated by the current source circuit to be small enough, and the second voltage is measured from the detected gate-source voltage minus the measured first voltage with the current generated by the current source circuit set to be a normal current.
42. An electronic device comprising a voltage generation unit as claimed in any one of claims 1 to 41, the voltage generation unit forming a reference voltage for the electronic device.
CN202190000058.XU 2021-03-08 2021-04-06 Voltage generation unit and electronic device Active CN218728758U (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CN202110251369.XA CN113031686A (en) 2021-03-08 2021-03-08 Voltage generation unit, method and electronic device
CN202110251369X 2021-03-08
CN2021102504563 2021-03-08
CN202110250456.3A CN112859990A (en) 2021-03-08 2021-03-08 Voltage generation unit and electronic device
PCT/CN2021/085672 WO2022188227A1 (en) 2021-03-08 2021-04-06 Voltage generation unit and electronic device

Publications (1)

Publication Number Publication Date
CN218728758U true CN218728758U (en) 2023-03-24

Family

ID=83227298

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202190000058.XU Active CN218728758U (en) 2021-03-08 2021-04-06 Voltage generation unit and electronic device

Country Status (2)

Country Link
CN (1) CN218728758U (en)
WO (1) WO2022188227A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5833858B2 (en) * 2011-08-02 2015-12-16 ルネサスエレクトロニクス株式会社 Reference voltage generation circuit
CN111522386B (en) * 2020-05-12 2021-03-30 珠海迈巨微电子有限责任公司 Reference voltage source, chip, power supply and electronic equipment
CN112306133B (en) * 2020-10-13 2022-05-10 上海兆芯集成电路有限公司 Voltage stabilizer
CN214278772U (en) * 2021-03-08 2021-09-24 珠海迈巨微电子有限责任公司 Voltage generation unit and electronic device

Also Published As

Publication number Publication date
WO2022188227A1 (en) 2022-09-15

Similar Documents

Publication Publication Date Title
US6789939B2 (en) Temperature sensor and method for operating a temperature sensor
US7808068B2 (en) Method for sensing integrated circuit temperature including adjustable gain and offset
US8120415B2 (en) Circuit for generating a temperature-compensated voltage reference, in particular for applications with supply voltages lower than 1V
CN107367336B (en) System and method for temperature sensing
US7920015B2 (en) Methods and apparatus to sense a PTAT reference in a fully isolated NPN-based bandgap reference
US6870421B2 (en) Temperature characteristic compensation apparatus
US7388387B2 (en) Method and apparatus for measurement of electrical resistance
US6783274B2 (en) Device for measuring temperature of semiconductor integrated circuit
US7482797B2 (en) Trimmable bandgap circuit
US9501078B2 (en) Voltage reference with low sensitivty to package shift
US9019727B2 (en) Temperature compensation of output diode in an isolated flyback converter
Wu et al. A low TC, supply independent and process compensated current reference
US7218167B2 (en) Electric reference voltage generating device of improved accuracy and corresponding electronic integrated circuit
US8680839B2 (en) Offset calibration technique to improve performance of band-gap voltage reference
CN111404484B (en) RC oscillator and electric device
JP2014063431A (en) Reference voltage generator circuit
US8089260B2 (en) Low voltage bandgap reference circuit
CN112787640B (en) Reference generator using FET devices with different gate operating functions
CN218728758U (en) Voltage generation unit and electronic device
US7719341B2 (en) MOS resistor with second or higher order compensation
US9304528B2 (en) Reference voltage generator with op-amp buffer
EP0794478A2 (en) Voltage and current reference circuit
CN214278772U (en) Voltage generation unit and electronic device
CN115357086B (en) Band gap reference circuit, operation method thereof and electronic device
US8022744B2 (en) Signal generator

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant