CN117762180A - Voltage regulating circuit and memory thereof - Google Patents

Voltage regulating circuit and memory thereof Download PDF

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Publication number
CN117762180A
CN117762180A CN202211132202.2A CN202211132202A CN117762180A CN 117762180 A CN117762180 A CN 117762180A CN 202211132202 A CN202211132202 A CN 202211132202A CN 117762180 A CN117762180 A CN 117762180A
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China
Prior art keywords
reference voltage
control signal
voltage
output
ambient temperature
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CN202211132202.2A
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Chinese (zh)
Inventor
郁佳
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Changxin Memory Technologies Inc
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Changxin Memory Technologies Inc
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Application filed by Changxin Memory Technologies Inc filed Critical Changxin Memory Technologies Inc
Priority to CN202211132202.2A priority Critical patent/CN117762180A/en
Priority to PCT/CN2022/124148 priority patent/WO2024055373A1/en
Publication of CN117762180A publication Critical patent/CN117762180A/en
Pending legal-status Critical Current

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    • 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
    • G05F1/565—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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/567—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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
    • G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
    • G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
    • G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
    • G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
    • G11C11/4074—Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Logic Circuits (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

The embodiment of the disclosure relates to the technical field of semiconductors, and provides a voltage adjusting circuit and a memory thereof, wherein the voltage adjusting circuit comprises: a reference voltage generation module configured to output a first reference voltage that varies with an ambient temperature based on an ambient temperature at which the reference voltage generation module is located; a comparison module configured to receive the first reference voltage, the second reference voltage, and the third reference voltage and compare magnitudes of the first reference voltage and the second reference voltage or magnitudes of the first reference voltage and the third reference voltage to output a control signal; the voltage output module receives the first reference voltage, the second reference voltage and the third reference voltage, takes one of the first reference voltage, the second reference voltage and the third reference voltage as a first input voltage of the voltage output module based on the control signal, and outputs an output voltage based on the first input voltage. Embodiments of the present disclosure facilitate at least regulation of an output voltage based on an ambient temperature.

Description

Voltage regulating circuit and memory thereof
Technical Field
The embodiment of the disclosure relates to the technical field of semiconductors, in particular to a voltage adjusting circuit and a memory thereof.
Background
Current memories have multiple power states to reduce their power consumption when idle or in a stall (e.g., low power state). In a power supply system of a memory, various power supply voltages need to be output, for example, some power supply voltages need to be changed along with temperature changes to improve the performance of the memory or prolong the service life of the memory, and some specific power supply voltages need to have a certain temperature coefficient in a certain temperature range, that is, the power supply voltages need to be changed along with temperature changes in the temperature range.
However, it is a challenge for the existing power supply system to make it possible to adjust the output power supply voltage based on temperature while ensuring that the power supply system stably outputs the power supply voltage, so as to increase the diversity of the output power supply voltage.
Disclosure of Invention
Embodiments of the present disclosure provide a voltage regulation circuit and a memory thereof that facilitate at least regulation of an output voltage based on an ambient temperature.
According to some embodiments of the present disclosure, an aspect of an embodiment of the present disclosure provides a voltage adjustment circuit, including: a reference voltage generation module configured to output a first reference voltage based on an ambient temperature at which the reference voltage generation module is located, the first reference voltage varying with a variation of the ambient temperature; a comparison module configured to receive the first reference voltage, the second reference voltage, and the third reference voltage, and compare magnitudes of the first reference voltage and the second reference voltage, or compare magnitudes of the first reference voltage and the third reference voltage, to output a control signal representing a comparison result, the second reference voltage and the third reference voltage being different fixed values; and a voltage output module receiving the first, second and third reference voltages, and using one of the first, second and third reference voltages as a first input voltage of the voltage output module based on the control signal, and outputting an output voltage based on the first input voltage.
In some embodiments, the reference voltage generation module is configured to: the first reference voltage is caused to rise as the ambient temperature decreases.
In some embodiments, the voltage output module is configured to: if the ambient temperature is greater than a first temperature, taking the received second reference voltage as the first input voltage based on the control signal; if the ambient temperature is less than the first temperature and greater than a second temperature, taking the received first reference voltage as the first input voltage based on the control signal; and if the ambient temperature is smaller than the second temperature, taking the received third reference voltage as the first input voltage based on the control signal.
In some embodiments, the first reference voltage is equal to the second reference voltage if the ambient temperature is equal to the first temperature; if the ambient temperature is equal to the second temperature, the first reference voltage is equal to the third reference voltage.
In some embodiments, the control signal comprises a first control signal and a second control signal, and the comparison module comprises: a first comparing unit configured to receive the first reference voltage and the second reference voltage and compare magnitudes of the first reference voltage and the second reference voltage to output the first control signal representing a first comparison result; and a second comparing unit configured to receive the first reference voltage and the third reference voltage and compare magnitudes of the first reference voltage and the third reference voltage to output the second control signal representing a second comparison result.
In some embodiments, the voltage output module comprises: a switching unit configured to receive the first, second, and third reference voltages and output one of the first, second, and third reference voltages as the first input voltage based on the first and second control signals; and a voltage output unit configured to receive the first input voltage and a second input voltage, which is a feedback voltage provided based on the output voltage, and output the output voltage.
In some embodiments, the voltage output unit includes a first input terminal that receives the first input voltage and a second input terminal that receives the second input voltage; the switching unit includes: a first switching unit configured to turn on or off a transmission path between the first input terminal and the first reference voltage based on the first control signal and the second control signal; a second switching unit configured to turn on or off a transmission path between the first input terminal and the second reference voltage based on the first control signal; and a third switching unit configured to turn on or off a transmission path between the first input terminal and the third reference voltage based on the second control signal.
In some embodiments, the first control signal and the second control signal vary based on a variation in the ambient temperature, the first switch unit including a logic determination circuit configured to: outputting a third control signal based on the first control signal and the second control signal, wherein the output third control signal is at a high level if the ambient temperature is less than the first temperature and greater than the second temperature; and if the ambient temperature is higher than the first temperature or lower than the second temperature, outputting the third control signal at a low level.
In some embodiments, the first switching unit is configured to: if the third control signal is at a high level, a transmission path between the first input end and the first reference voltage is conducted; and if the third control signal is in a low level, switching off a transmission path between the first input end and the first reference voltage.
In some embodiments, the first comparison unit includes a first positive input that receives the second reference voltage and a first negative input that receives the first reference voltage; the first comparing unit is configured to: if the ambient temperature is greater than the first temperature, the second reference voltage is greater than the first reference voltage, and the first control signal is at a high level; and if the ambient temperature is less than the first temperature, the second reference voltage is less than the first reference voltage, and the first control signal is in a low level.
In some embodiments, the second switching unit is configured to: if the first control signal is at a high level, a transmission path between the first input end and the second reference voltage is conducted; and if the first control signal is in a low level, switching off a transmission path between the first input end and the second reference voltage.
In some embodiments, the second comparison unit includes a second positive input that receives the third reference voltage and a second negative input that receives the first reference voltage; the second comparing unit is configured to: if the ambient temperature is greater than the second temperature, the third reference voltage is greater than the first reference voltage, and the second control signal is at a high level; and if the ambient temperature is less than the second temperature, the third reference voltage is less than the first reference voltage, and the second control signal is at a low level.
In some embodiments, the third switching unit is further configured to: if the second control signal is at a high level, switching off a transmission path between the first input end and the third reference voltage; and if the second control signal is in a low level, a transmission path between the first input end and the third reference voltage is conducted.
In some embodiments, the logic determination circuit includes an exclusive or circuit, and if the first control signal and the second control signal are both at a high level, the third control signal output by the exclusive or circuit is at a low level; if the first control signal is at a low level, the second control signal is at a high level, and the third control signal output by the exclusive or gate circuit is at a high level; and if the first control signal and the second control signal are both in a low level, the third control signal output by the exclusive or gate circuit is in a low level.
In some embodiments, the second comparison unit includes a second positive input that receives the first reference voltage and a second negative input that receives the third reference voltage; the second comparing unit is configured to: if the ambient temperature is greater than the second temperature, the first reference voltage is less than the third reference voltage, and the second control signal is at a low level; and if the ambient temperature is smaller than the second temperature, the first reference voltage is larger than the third reference voltage, and the second control signal is in a high level.
In some embodiments, the third switching unit is further configured to: if the second control signal is at a high level, a transmission path between the first input end and the third reference voltage is conducted; and if the second control signal is in a low level, switching off a transmission path between the first input end and the third reference voltage.
In some embodiments, the logic determination circuit includes a nor gate circuit, and if the first control signal is at a high level and the second control signal is at a low level, the third control signal output by the nor gate circuit is at a low level; if the first control signal and the second control signal are both low level, the third control signal output by the nor gate circuit is high level; and if the first control signal is at a low level, the second control signal is at a high level, and the third control signal output by the NOR gate is at a low level.
In some embodiments, the first comparison unit includes a first positive input that receives the first reference voltage and a first negative input that receives the second reference voltage; the first comparing unit is configured to: if the ambient temperature is greater than the first temperature, the first reference voltage is less than the second reference voltage, and the first control signal is at a low level; if the ambient temperature is less than the first temperature, the first reference voltage is greater than the second reference voltage, and the first control signal is at a high level; the second switching unit is configured to: if the ambient temperature is greater than the first temperature, conducting a transmission path between the first input end and the second reference voltage based on the first control signal; and if the ambient temperature is smaller than the first temperature, switching off a transmission path between the first input end and the second reference voltage based on the first control signal.
In some embodiments, the voltage adjustment circuit further comprises: the second reference voltage supply module comprises at least two second gear switches, and one second gear switch corresponds to a first preset voltage; the second reference voltage supply module is configured to selectively turn on the second gear switch to output the first preset voltage as the second reference voltage.
In some embodiments, the voltage adjustment circuit further comprises: the third reference voltage supply module comprises at least two third gear switches, and one third gear switch corresponds to a second preset voltage; the third reference voltage supply module is configured to selectively turn on the third gear switch and output the second preset voltage as the third reference voltage.
According to some embodiments of the present disclosure, another aspect of embodiments of the present disclosure also provides a memory including the voltage adjustment circuit of any one of the above.
The technical scheme provided by the embodiment of the disclosure has at least the following advantages:
the reference voltage generating module is used for generating a first reference voltage which can change along with the change of the ambient temperature, and additionally providing a second reference voltage and a third reference voltage which are different fixed values, and the comparison module is used for comparing the magnitudes of the first reference voltage and the second reference voltage or comparing control signals output by the magnitudes of the first reference voltage and the third reference voltage, so that one of the first reference voltage, the second reference voltage and the third reference voltage is used as a first input voltage of the voltage output module by the voltage output module. In this way, in a certain range of ambient temperature interval, the voltage output module takes the first reference voltage as the first input voltage, and can output the output voltage which changes along with the change of the ambient temperature based on the first reference voltage which changes along with the change of the ambient temperature.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings do not depict a proportional limitation unless expressly stated otherwise; in order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the conventional technology, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
FIG. 1 is a schematic diagram of a functional block of a voltage regulator circuit according to an embodiment of the disclosure;
FIG. 2 is a line diagram of an output voltage of a voltage regulator circuit according to an embodiment of the present disclosure;
FIG. 3 is a diagram illustrating another line graph of the output voltage of the voltage regulator circuit according to an embodiment of the present disclosure according to the ambient temperature;
FIG. 4 is a circuit diagram of a reference voltage generating module in a voltage adjusting circuit according to an embodiment of the disclosure;
FIG. 5 is a schematic diagram of another functional module of the voltage adjusting circuit according to an embodiment of the disclosure;
FIG. 6 is a diagram illustrating another example of a line graph of output voltage of the voltage regulator circuit according to an embodiment of the present disclosure;
FIG. 7 is a circuit diagram of a comparison module in a voltage adjustment circuit according to an embodiment of the disclosure;
FIG. 8 is a schematic diagram of a functional block of a voltage output module in a voltage regulation circuit according to an embodiment of the disclosure;
fig. 9, 10 and 13 are three circuit diagrams of a voltage output module in a voltage regulation circuit according to an embodiment of the disclosure;
fig. 11 and 12 are two other circuit diagrams of a comparison module in a voltage adjustment circuit according to an embodiment of the disclosure.
Detailed Description
As known from the background art, there is a need to provide a power supply voltage that can be adjusted based on temperature in a memory, and the variety of the power supply voltage needs to be improved.
The embodiment of the disclosure provides a voltage adjusting circuit and a memory thereof, wherein in the voltage adjusting circuit, a reference voltage generating module is utilized to generate a first reference voltage which changes according to the change of the ambient temperature, and a control signal generated by a comparing module is utilized to enable a voltage output module to take one of the first reference voltage, a second reference voltage and a third reference voltage as a first input voltage of the voltage output module. In this way, in a certain range of ambient temperature interval, the voltage output module takes the first reference voltage as the first input voltage, and can output the output voltage which changes along with the change of the ambient temperature based on the first reference voltage which changes along with the change of the ambient temperature.
Embodiments of the present disclosure will be described in detail below with reference to the attached drawings. However, those of ordinary skill in the art will understand that in the various embodiments of the present disclosure, numerous technical details have been set forth in order to provide a better understanding of the embodiments of the present disclosure. However, the technical solutions claimed in the embodiments of the present disclosure can be implemented without these technical details and based on various changes and modifications of the following embodiments.
An embodiment of the present disclosure provides a voltage adjusting circuit, and the voltage adjusting circuit provided by the embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a functional block of a voltage regulator circuit according to an embodiment of the disclosure; FIG. 2 is a line diagram of an output voltage of a voltage regulator circuit according to an embodiment of the present disclosure; FIG. 3 is a diagram illustrating another line graph of the output voltage of the voltage regulator circuit according to an embodiment of the present disclosure according to the ambient temperature; FIG. 4 is a circuit diagram of a reference voltage generating module in a voltage adjusting circuit according to an embodiment of the disclosure; FIG. 5 is a schematic diagram of another functional module of the voltage adjusting circuit according to an embodiment of the disclosure; FIG. 6 is a diagram illustrating another example of a line graph of output voltage of the voltage regulator circuit according to an embodiment of the present disclosure; FIG. 7 is a circuit diagram of a comparison module in a voltage adjustment circuit according to an embodiment of the disclosure; FIG. 8 is a schematic diagram of a functional block of a voltage output module in a voltage regulation circuit according to an embodiment of the disclosure; fig. 9, 10 and 13 are three circuit diagrams of a voltage output module in a voltage regulation circuit according to an embodiment of the disclosure; fig. 11 and 12 are two other circuit diagrams of a comparison module in a voltage adjustment circuit according to an embodiment of the disclosure.
Referring to fig. 1, the voltage adjusting circuit includes: a reference voltage generation module 100 configured to output a first reference voltage Vref1 based on an ambient temperature Temp at which the reference voltage generation module 100 is located, the first reference voltage Vref1 varying with a variation of the ambient temperature Temp; a comparison module 101 configured to receive the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3, and compare magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2, or compare magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3, to output a control signal op representing a comparison result, the second reference voltage Vref2 and the third reference voltage Vref3 being different fixed values; the voltage output module 102 receives the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3, and uses one of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3 as a first input voltage Vin1 of the voltage output module 102 based on the control signal op, and outputs an output voltage Vout based on the first input voltage Vin 1.
The reference voltage generating module 100 generates a first reference voltage Vref1 that varies with ambient temperature. And the second reference voltage Vref2 and the third reference voltage Vref3, which are additionally provided as different fixed values, i.e., the second reference voltage Vref2 and the third reference voltage Vref3 do not vary with the ambient temperature Temp.
Then, the comparing module 101 is used to compare the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2, and since the first reference voltage Vref1 changes with the change of the ambient temperature Temp, when the ambient temperature Temp is the first temperature, the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2 are equal, and when the ambient temperature Temp is not the first temperature, the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2 are different, so the comparing module 101 can generate different control signals op based on the difference of the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2, so that the voltage output module 102 takes the first reference voltage Vref1 or the second reference voltage Vref2 as the first input voltage Vin1 based on the different control signals op.
Alternatively, the comparing module 101 is used to compare the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3, and since the first reference voltage Vref1 changes with the change of the ambient temperature Temp, when the ambient temperature Temp is the second temperature, the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3 are equal, and when the ambient temperature Temp is not the second temperature, the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3 are different, so the comparing module 101 can generate different control signals op based on the difference of the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3, so that the voltage output module 102 takes the first reference voltage Vref1 or the third reference voltage Vref3 as the first input voltage Vin1 based on the different control signals op.
Thus, in one example, in a certain range of ambient temperature intervals, for example, when the ambient temperature Temp is greater than the second temperature and less than the first temperature, the change of the first reference voltage Vref1 enables the voltage output module 102 to take the first reference voltage Vref1 as the first input voltage Vin1 and output the output voltage Vout that changes with the change of the ambient temperature Temp based on the first reference voltage Vref1 that changes with the change of the ambient temperature Temp, and in other ambient temperature intervals, for example, the ambient temperature Temp is less than or equal to the second temperature or greater than or equal to the first temperature, the change of the first reference voltage Vref1 enables the voltage output module 102 to take the second reference voltage Vref2 or the third reference voltage Vref3 as the first input voltage Vin1 and output the output voltage Vout that changes with the change of the ambient temperature based on the second reference voltage Vref2 or the third reference voltage Vref3 that is a fixed value, so as to implement adjustment of the output voltage Vout based on the ambient temperature Temp, so as to improve the diversity of the output voltage Vout.
In the above example, the first temperature is greater than the second temperature, and in practical application, the second temperature may be greater than the first temperature. In addition, the first reference voltage Vref1 is equal to one of the second reference voltage Vref2 and the third reference voltage Vref3 in magnitude when the ambient temperature Temp is equal to the first temperature, and the first reference voltage Vref1 is equal to the other of the second reference voltage Vref2 and the third reference voltage Vref3 in magnitude when the ambient temperature Temp is equal to the second temperature.
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.
In some embodiments, referring to fig. 2, the reference voltage generation module 100 may be configured to: the first reference voltage Vref1 is made to rise as the ambient temperature Temp decreases. It should be noted that, in practical application, referring to fig. 3, the reference voltage generating module 100 may also be configured to: the first reference voltage Vref1 is caused to rise with an increase in the ambient temperature Temp. In an embodiment of the disclosure, the trend of the first reference voltage Vref1 changing along with the change of the ambient temperature Temp is not limited, and may be set according to actual requirements. The voltage adjusting circuit will be described in detail later, taking the reference voltage generating module 100 as an example that the first reference voltage Vref1 increases with the decrease of the ambient temperature Temp.
In some embodiments, referring to fig. 4, the reference voltage generation module 100 may include: the voltage at one end of the first resistor R1 is a first voltage Vbg, one ends of the other end of the first resistor R1 and the second resistor R2 are electrically connected with the first node net1, and the voltage at the first node net1 is a first reference voltage Vref1; and the base electrode and the collector electrode of the Triode trigger are electrically connected with the other end of the second resistor R2, the emitter electrode of the Triode trigger is grounded, and the voltage of the base electrode and the collector electrode of the Triode trigger is the second voltage Vbe. It will be appreciated that in such a connection, the voltage difference Vbe between the base and the emitter of the Triode, i.e. the voltage difference Vbe between the base and the emitter, may have a negative temperature coefficient, i.e. increase with decreasing ambient temperature Temp, such that the current flowing through the Triode, the first resistor R1 and the second resistor R2, decreases with decreasing ambient temperature Temp, such that the voltage at the first node net1 increases with decreasing ambient temperature Temp, i.e. the first reference voltage Vref1 increases with decreasing ambient temperature Temp.
Note that, the base and the emitter and collector of the Triode trigger are both electrically connected to the other end of the second resistor R2, and the collector and emitter of the Triode trigger are grounded.
In one example, the first voltage Vbg may be a bandgap reference voltage that does not vary with ambient temperature Temp.
In some embodiments, the reference voltage generation module 100 may further include: and one end of the third resistor R3 is electrically connected with the first node net1, and the other end of the third resistor R3 is grounded.
The voltage output module 102 receives the first input voltage Vin1 based on the control signal op in detail by four embodiments.
In some embodiments, referring to fig. 1 and 2, the voltage output module 102 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, taking the received second reference voltage Vref2 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is smaller than the first temperature Temp1 and larger than the second temperature Temp2, taking the received first reference voltage Vref1 as a first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.
In other embodiments, the first reference voltage Vref1 may rise with an increase in the ambient temperature Temp, and the second reference voltage Vref2 may be greater than the third reference voltage Vref3. Wherein the voltage output module 102 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, taking the received second reference voltage Vref2 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.
In the above two embodiments, if the ambient temperature Temp is equal to the first temperature Temp1, the first reference voltage Vref1 is equal to the second reference voltage Vref2; if the ambient temperature Temp is equal to the second temperature Temp2, the first reference voltage Vref1 is equal to the third reference voltage Vref3.
In still other embodiments, referring to fig. 1 and 3, the voltage output module 102 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, taking the received third reference voltage Vref3 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is smaller than the first temperature Temp1 and larger than the second temperature Temp2, taking the received first reference voltage Vref1 as a first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op. The first reference voltage Vref1 increases with the increase of the ambient temperature Temp, and the second reference voltage Vref2 is smaller than the third reference voltage Vref3.
In still other embodiments, the first reference voltage Vref1 increases with a decrease in the ambient temperature Temp, and the second reference voltage Vref2 may be greater than the third reference voltage Vref3. Wherein the voltage output module 102 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, taking the received third reference voltage Vref3 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op.
In the above two embodiments, if the ambient temperature Temp is equal to the first temperature Temp1, the first reference voltage Vref1 is equal to the third reference voltage Vref3; if the ambient temperature Temp is equal to the second temperature Temp2, the first reference voltage Vref1 is equal to the second reference voltage Vref2.
In the four embodiments described above, the first temperature Temp1 is greater than the second temperature Temp2. In one example, the first temperature may be 20℃and the second temperature may be-10 ℃.
In some embodiments, referring to fig. 5, the voltage adjustment circuit may further include: the second reference voltage supply module 103, the second reference voltage supply module 103 includes at least two second gear switches 113, a second gear switch 113 corresponds to a first preset voltage; the second reference voltage supply module 103 may be configured to selectively turn on the second gear switch 113 to output a first predetermined voltage as the second reference voltage Vref2. In addition, referring to fig. 5, the second reference voltage supply module 103 further includes a second reference voltage supply unit 123 configured to supply a first preset voltage having a different voltage value.
In fig. 5, taking the second reference voltage supply module 103 including three second gear switches 113, the first preset voltages corresponding to the second gear switches 113 are Vref21, vref22 and Vref23 as examples, the second reference voltage supply module 103 selectively turns on the second gear switches 113 to output one of the Vref21, vref22 and Vref23 as the second reference voltage Vref2, wherein the voltage values of the Vref21, vref22 and Vref23 are different. In practical applications, the number of the second gear switches 113 included in the second reference voltage supply module 103 is not limited, and only the one-to-one correspondence between the second gear switches 113 and the first preset voltage needs to be satisfied.
Thus, referring to fig. 5 and 6 in combination, since the second reference voltage supply unit 123 may provide the first preset voltages having different voltage values, for example, vref21, vref22 and Vref23, and then one of the three second gear switches 113 is turned on, one of the three first preset voltages is output as the second reference voltage Vref2, so that the voltage value of the second reference voltage Vref2 may be adjusted, the second reference voltage Vref2 may be provided with different gear positions, that is, the second reference voltage Vref2 may be provided to the comparison module 101 with different magnitudes, and the first temperature Temp1 may also have a gear position corresponding to the gear position of the second reference voltage Vref2, that is, one first preset voltage corresponds to one first temperature Temp1, so as to achieve adjustment of the second reference voltage Vref2, and to achieve adjustment of the first temperature Temp1, thereby facilitating adjustment of a range of a temperature interval formed by the first temperature Temp1 and the second temperature Temp2, so as to improve diversity of the output voltage Vref1 and the first temperature Temp 2.
In some embodiments, with continued reference to fig. 5, the voltage adjustment circuit may further include: the third reference voltage supply module 104, the third reference voltage supply module 104 may include at least two third gear switches 114, where a third gear switch 114 corresponds to a second preset voltage; the third reference voltage supply module 104 may be configured to selectively turn on the third gear switch 114 to output a second predetermined voltage as the third reference voltage Vref 3. In addition, referring to fig. 5, the third reference voltage supply module 104 further includes a third reference voltage supply unit 124 configured to provide a second preset voltage having a different voltage value.
In fig. 5, taking the third reference voltage supply module 104 including three third gear switches 114 as an example, the second preset voltages corresponding to the third gear switches 114 are Vref31, vref32 and Vref33, respectively, the third reference voltage supply module 104 selectively turns on the third gear switches 114 to output one of the Vref31, vref32 and Vref33 as the third reference voltage Vref3, wherein the voltage values of the Vref31, vref32 and Vref33 are different. In practical applications, the number of the third gear switches 114 included in the third reference voltage supply module 104 is not limited, and only the third gear switches 114 and the second preset voltage are required to be in one-to-one correspondence.
Thus, referring to fig. 5 and 6 in combination, since the third reference voltage supply unit 124 may provide the second preset voltages having different voltage values, for example, vref31, vref32 and Vref33, and then one of the three third gear switches 114 is turned on, one of the three second preset voltages is output as the third reference voltage Vref3, so that the voltage value of the third reference voltage Vref3 may be adjusted, the third reference voltage Vref may be provided with different gear positions, that is, the third reference voltage Vref3 having different magnitudes may be provided to the comparison module 101, the second temperature Temp2 may also have a gear position corresponding to the gear position of the third reference voltage Vref3, that is, one second preset voltage corresponds to one second temperature Temp2, so as to achieve adjustment of the third reference voltage Vref3, and to achieve adjustment of the second temperature Temp2, thereby facilitating adjustment of a range of a temperature interval formed by the first temperature Temp1 and the second temperature Temp2, so as to improve diversity of the output of the third reference voltage Vref3 and the first reference voltage Vref 1.
It should be noted that, in fig. 5, the voltage adjustment circuit includes both the second reference voltage supply module 103 and the third reference voltage supply module 104 as an example, and in practical application, the voltage adjustment circuit may include only one of the second reference voltage supply module 103 and the third reference voltage supply module 104. In fig. 6, taking the example that the first temperature Temp1 and the second temperature Temp2 each include a plurality of gear steps, in practical application, only one of the first temperature Temp1 and the second temperature Temp2 may include a plurality of gear steps.
The comparison module 101 and the voltage output module 102 are described in detail below.
In some embodiments, referring to fig. 7 to 10, the control signal op may include a first control signal op1 and a second control signal op2, and the comparison module 101 may include: a first comparing unit 111 configured to receive the first reference voltage Vref1 and the second reference voltage Vref2, and compare magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2 to output a first control signal op1 representing a first comparison result; the second comparing unit 121 is configured to receive the first reference voltage Vref1 and the third reference voltage Vref3, and compare magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3 to output a second control signal op2 representing a second comparison result.
In some embodiments, referring to fig. 8, the voltage output module 102 may include: a switching unit 112 configured to receive the first, second, and third reference voltages Vref, vref2, and Vref3, and output one of the first, second, and third reference voltages Vref1, vref2, and Vref as a first input voltage Vin1 based on the first and second control signals op1 and op 2; the voltage output unit 122 is configured to receive a first input voltage Vin1 and a second input voltage Vin2 and output an output voltage Vout, the second input voltage Vin2 being a feedback voltage provided based on the output voltage Vout.
In some embodiments, referring to fig. 8 to 10, the voltage output unit 122 may include: the operational amplifier 132, the operational amplifier 132 includes a first input terminal, a second input terminal and an output terminal, the first input terminal receives the first input voltage Vin1, the second input terminal receives the second input voltage Vin2, and the output terminal outputs the output voltage Vout.
In some embodiments, referring to fig. 8 to 10, the voltage output unit 122 may further include: the second node net2, the third node net3, the fourth resistor R4 and the fifth resistor R5, the second node net2 is a connection point between the output end of the operational amplifier 132 and one end of the fourth resistor R4, the voltage at the second node net2 is the output voltage Vout, the other end of the fourth resistor R4 and one end of the fifth resistor R5 are all electrically connected with the third node net3, the other end of the fifth resistor R5 is grounded, the third node net3 is also electrically connected with the second input end of the operational amplifier 132, and the voltage at the third node net3 is the second input voltage Vin2.
When the operational amplifier 132 adjusts the output voltage Vout based on the received first input voltage Vin1 and the second input voltage Vin2, if the first input voltage Vin1 is greater than the second input voltage Vin2, the operational amplifier 132 outputs a greater output voltage Vout, so that the current flowing through the fourth resistor R4 and the fifth resistor R5 is greater, and the voltage at the third node net3, that is, the second input voltage Vin2, is increased until the second input voltage Vin2 is equal to the first input voltage Vin1, so that the operational amplifier 132 outputs the output voltage Vout with a stable voltage value; if the first input voltage Vin1 is smaller than the second input voltage Vin2, the operational amplifier 132 outputs a smaller output voltage Vout, so that the current flowing through the fourth resistor R4 and the fifth resistor R5 is smaller, and the voltage at the third node net3, i.e. the second input voltage Vin2, is reduced until the second input voltage Vin2 is equal to the first input voltage Vin1, so that the operational amplifier 132 outputs the output voltage Vout with a stable voltage value.
In some embodiments, referring to fig. 9 and 10, the voltage output unit 122 may include a first input terminal receiving the first input voltage Vin1 and a second input terminal receiving the second input voltage Vin2; the switching unit 112 may include: a first switching unit 142 configured to turn on or off a transmission path between the first input terminal and the first reference voltage Vref1 based on the first control signal op1 and the second control signal op 2; a second switching unit 152 configured to turn on or off a transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op 1; the third switching unit 162 is configured to turn on or off a transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op 2.
It can be understood that, when the voltage adjusting circuit is in an operating state, based on the first control signal op1 and the second control signal op2, only one of the transmission paths controlled by the first switch unit 142, the second switch unit 152 and the third switch unit 162 is in an on state, and the conduction paths of the other two are in an off state. Moreover, the first control signal op1 and the second control signal op2 are related to the magnitudes of the first reference voltage Vref1, the second reference voltage Vref2 and the third reference voltage Vref3, and based on the magnitudes of the first reference voltage Vref1, the second reference voltage Vref2 and the third reference voltage Vref3, the environmental temperature Temp of the voltage adjusting circuit is determined to be different, so that the first control signal op1 and the second control signal op2 generated by the comparing module 101 are different, so that the operating states of the first switch unit 142, the second switch unit 152 and the third switch unit 162 are different, and thus the first input voltage Vin1 received by the voltage output module 102 is changed along with the change of the environmental temperature Temp, and the output voltage Vout is changed along with the change of the environmental temperature Temp.
In some embodiments, with continued reference to fig. 9 and 10, the first and second control signals op1 and op2 vary based on a variation in the ambient temperature Temp, the first switch unit 142 includes a logic determination circuit 172, the logic determination circuit 172 being configured to: outputting a third control signal op3 based on the first control signal op1 and the second control signal op2, wherein if the ambient temperature Temp is smaller than the first temperature Temp1 and larger than the second temperature Temp2, the output third control signal op3 is at a high level; if the ambient temperature Temp is greater than the first temperature Temp1 or less than the second temperature Temp2, the output third control signal op3 is at low level.
In some embodiments, the first switching unit 142 may be configured to: if the third control signal op3 is at high level, the transmission path between the first input end and the first reference voltage Vref1 is conducted; if the third control signal op3 is at low level, the transmission path between the first input terminal and the first reference voltage Vref1 is turned off.
It should be noted that, in practical applications, the first switch unit 142 may also be configured to: if the third control signal op3 is at low level, the transmission path between the first input terminal and the first reference voltage Vref1 is conducted; if the third control signal op3 is at high level, the transmission path between the first input terminal and the first reference voltage Vref1 is turned off. In addition, in fig. 9 and fig. 10, the control of the transmission path between the first input terminal and the first reference voltage Vref1 by the first switching unit 142 is illustrated in a simple drawing manner of the switch, and in practical application, a device for controlling the transmission path between the first input terminal and the first reference voltage Vref1 is not limited, and only needs to meet that the device can switch on and off the transmission path between the first input terminal and the first reference voltage Vref1 based on the high level and the low level of the third control signal op 3.
The following describes in detail the fitting relationship between the first comparing unit 111, the second comparing unit 121, and the switching unit 112.
In some embodiments, referring to fig. 2 and 7 in combination, the first comparing unit 111 may include a first positive input terminal receiving the second reference voltage Vref2 and a first negative input terminal receiving the first reference voltage Vref1; the first comparing unit 111 is configured to: if the ambient temperature Temp is greater than the first temperature Temp1, the second reference voltage Vref2 is greater than the first reference voltage Vref1, and the first control signal op1 is at a high level; if the ambient temperature Temp is less than the first temperature Temp1, the second reference voltage Vref2 is less than the first reference voltage Vref1, and the first control signal op1 is at a low level.
Wherein, referring to fig. 9 and 10, the second switching unit 152 may be configured to: if the first control signal op1 is at high level, a transmission path between the first input end and the second reference voltage Vref2 is conducted; if the first control signal op1 is at low level, the transmission path between the first input terminal and the second reference voltage Vref2 is turned off.
It should be noted that, in practical applications, the second switching unit 152 may also be configured to: if the first control signal op1 is at low level, a transmission path between the first input end and the second reference voltage Vref2 is conducted; if the first control signal op1 is at high level, the transmission path between the first input terminal and the second reference voltage Vref2 is turned off. In addition, in fig. 9 and fig. 10, the control of the transmission path between the first input terminal and the second reference voltage Vref2 by the second switching unit 152 is illustrated in a simple drawing manner of the switch, and in practical application, a device for controlling the transmission path between the first input terminal and the second reference voltage Vref2 is not limited, and only needs to meet that the device can switch on and off the transmission path between the first input terminal and the second reference voltage Vref2 based on the high level and the low level of the first control signal op 1.
In the following, taking the first positive input terminal of fig. 7 receiving the second reference voltage Vref2, the first negative input terminal receiving the first reference voltage Vref1, and turning on the transmission path between the first input terminal and the second reference voltage Vref2 when the first control signal op1 is at a high level, turning off the transmission path between the first input terminal and the second reference voltage Vref2 when the first control signal op1 is at a low level, turning on the transmission path between the first input terminal and the first reference voltage Vref1 when the third control signal op3 is at a high level, and turning off the transmission path between the first input terminal and the first reference voltage Vref1 when the third control signal op3 is at a low level as an example, the second comparing unit 121 and the switching unit 112 will be described in detail.
In some embodiments, referring to fig. 2 and 7 in combination, the second comparing unit 121 includes a second positive input terminal and a second negative input terminal, the second positive input terminal receiving the third reference voltage Vref3, the second negative input terminal receiving the first reference voltage Vref1; the second comparing unit 121 is configured to: if the ambient temperature Temp is greater than the second temperature Temp2, the third reference voltage Vref3 is greater than the first reference voltage Vref1, and the second control signal op2 is at a high level; if the ambient temperature Temp is less than the second temperature Temp2, the third reference voltage Vref3 is less than the first reference voltage Vref1, and the second control signal op2 is at a low level.
Wherein, referring to fig. 9, the third switching unit 162 may be further configured to: if the second control signal op2 is at high level, the transmission path between the first input end and the third reference voltage Vref3 is turned off; if the second control signal op2 is at low level, the transmission path between the first input terminal and the third reference voltage Vref3 is turned on.
It should be noted that, in practical applications, the third switching unit 162 may also be configured to: if the second control signal op2 is at high level, the transmission path between the first input end and the third reference voltage Vref3 is conducted; if the second control signal op2 is at a low level, the transmission path between the first input terminal and the third reference voltage Vref3 is turned off, which will be described in detail later through another embodiment. In addition, in fig. 9, the control of the transmission path between the first input terminal and the third reference voltage Vref3 by the third switching unit 162 is illustrated in a simple drawing manner of the switch, and in practical application, a device for controlling the transmission path between the first input terminal and the third reference voltage Vref3 is not limited, and only needs to meet that the device can switch on and off the transmission path between the first input terminal and the third reference voltage Vref3 based on the high and low level of the second control signal op 2.
The logic judging circuit 172 includes an exclusive or circuit, and if the first control signal op1 and the second control signal op2 are both at high level, the third control signal op3 output by the exclusive or circuit is at low level; if the first control signal op1 is at a low level, the second control signal op2 is at a high level, and the third control signal op3 output by the exclusive or gate circuit is at a high level; if the first control signal op1 and the second control signal op2 are both at low level, the third control signal op3 output by the exclusive or gate circuit is at low level.
The operation principle of the voltage adjusting circuit according to the above embodiment is described in detail with reference to fig. 1, 2, 7, 9 and the table.
List one
First control signal op1 Second control signal op2 Third control signal op3
1 1 0
0 1 1
0 0 0
If the ambient temperature Temp is greater than the first temperature Temp1, the first reference voltage Vref1 is less than the second reference voltage Vref2 and the third reference voltage Vref3, the first control signal op1 and the second control signal op2 are at high level, the third control signal op3 is at low level, at this time, the second switching unit 152 turns on the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at high level, the first switching unit 142 turns off the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at low level, and the third switching unit 162 turns off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at high level. In this way, if the ambient temperature Temp is greater than the first temperature Temp1, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op.
If the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, the first reference voltage Vref1 is less than the third reference voltage Vref3 and greater than the second reference voltage Vref2, the first control signal op1 is at a low level, the second control signal op2 and the third control signal op3 are at a high level, at this time, the first switching unit 142 turns on the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at the high level, the second switching unit 152 turns off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at the low level, and the third switching unit 162 turns off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at the high level. In this way, if the ambient temperature Temp is smaller than the first temperature Temp1 and larger than the second temperature Temp2, the received first reference voltage Vref1 is used as the first input voltage Vin1 based on the control signal op.
If the ambient temperature Temp is less than the second temperature Temp2, the first reference voltage Vref1 is greater than the third reference voltage Vref3 and the second reference voltage Vref2, the first control signal op1, the second control signal op2 and the third control signal op3 are all at low level, at this time, the third switching unit 162 turns on the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at low level, the first switching unit 142 turns off the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at low level, and the second switching unit 152 turns off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at low level. In this way, if the ambient temperature Temp is smaller than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.
In other embodiments, referring to fig. 2 and 11 in combination, the second comparing unit 121 includes a second positive input terminal and a second negative input terminal, the second positive input terminal receives the first reference voltage Vref1, and the second negative input terminal receives the third reference voltage Vref3; the second comparing unit 121 is configured to: if the ambient temperature Temp is greater than the second temperature Temp2, the first reference voltage Vref1 is less than the third reference voltage Vref3, and the second control signal op2 is at low level; if the ambient temperature Temp is less than the second temperature Temp2, the first reference voltage Vref1 is greater than the third reference voltage Vref3, and the second control signal op2 is at a high level.
Wherein the third switching unit 162 may be further configured to: if the second control signal op2 is at high level, the transmission path between the first input end and the third reference voltage Vref3 is conducted; if the second control signal op2 is at low level, the transmission path between the first input terminal and the third reference voltage Vref3 is turned off.
Referring to fig. 10, the logic determination circuit 172 may include a nor gate circuit, where if the first control signal op1 is at a high level, the second control signal op2 is at a low level, and the third control signal op3 output by the nor gate circuit is at a low level; if the first control signal op1 and the second control signal op2 are both low level, the third control signal op3 output by the nor gate circuit is high level; if the first control signal op1 is at low level, the second control signal op2 is at high level, and the third control signal op3 outputted from the nor gate is at low level.
The operation principle of the voltage adjusting circuit according to the above embodiment is described in detail below with reference to fig. 1, 2, 10, 11 and table two.
Watch II
First control signal op1 Second control signal op2 Third control signal op3
1 0 0
0 0 1
0 1 0
If the ambient temperature Temp is greater than the first temperature Temp1, the first reference voltage Vref1 is less than the second reference voltage Vref2 and the third reference voltage Vref3, the first control signal op1 is at a high level, the second control signal op2 and the third control signal op3 are at a low level, at this time, the second switching unit 152 turns on the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at the high level, the first switching unit 142 turns off the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at the low level, and the third switching unit 162 turns off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at the low level. In this way, if the ambient temperature Temp is greater than the first temperature Temp1, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op.
If the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, the first reference voltage Vref1 is less than the third reference voltage Vref3 and greater than the second reference voltage Vref2, the first control signal op1 and the second control signal op2 are at low level, the third control signal op3 is at high level, at this time, the first switching unit 142 turns on the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at high level, the second switching unit 152 turns off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at low level, and the third switching unit 162 turns off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at low level. In this way, if the ambient temperature Temp is smaller than the first temperature Temp1 and larger than the second temperature Temp2, the received first reference voltage Vref1 is used as the first input voltage Vin1 based on the control signal op.
If the ambient temperature Temp is less than the second temperature Temp2, the first reference voltage Vref1 is greater than the third reference voltage Vref3 and the second reference voltage Vref2, the second control signal op2 is at a high level, the first control signal op1 and the third control signal op3 are both at a low level, at this time, the third switching unit 162 turns on the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 at the high level, the first switching unit 142 turns off the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 at the low level, and the second switching unit 152 turns off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 at the low level. In this way, if the ambient temperature Temp is smaller than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.
It should be noted that, in practical application, the first comparing unit 111 may include a first positive phase input end and a first negative phase input end, where the first positive phase input end receives the first reference voltage Vref1, and the first negative phase input end receives the second reference voltage Vref2; the first comparing unit 111 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, the first reference voltage Vref1 is less than the second reference voltage Vref2, and the first control signal op1 is at a low level; if the ambient temperature Temp is less than the first temperature Temp1, the first reference voltage Vref1 is greater than the second reference voltage Vref2, and the first control signal op1 is at a high level; the second switching unit 152 is configured to: if the ambient temperature Temp is greater than the first temperature Temp1, a transmission path between the first input end and the second reference voltage Vref2 is conducted based on the first control signal op 1; if the ambient temperature Temp is less than the first temperature Temp1, the transmission path between the first input terminal and the second reference voltage Vref2 is turned off based on the first control signal op 1.
It can be understood that, in the first comparing unit 111 provided in an embodiment of the present disclosure, it is not limited which input terminal of the first comparing unit 111 the first reference voltage Vref1 and the second reference voltage Vref2 are received, and only one of the first positive phase input terminal and the first negative phase input terminal needs to receive the first reference voltage Vref1, and the other one receives the second reference voltage Vref 2; in the second comparing unit 121, it is also not limited which input terminal of the second comparing unit 121 receives the first reference voltage Vref1 and the third reference voltage Vref3, and only one of the second positive input terminal and the second negative input terminal receives the first reference voltage Vref1, and the other receives the third reference voltage Vref 3. The logic determination circuit 172 that generates the third control signal op3 based on the first control signal op1 and the second control signal op2 then adjusts the control logic of the transmission path between the first input terminal and the first reference voltage Vref1 by the first switching unit 142 based on the third control signal op3, adjusts the control logic of the transmission path between the first input terminal and the second reference voltage Vref2 by the second switching unit 152 based on the first control signal op1, or adjusts the control logic of the transmission path between the first input terminal and the third reference voltage Vref3 by the third switching unit 162 based on the second control signal op2, so that only one of the transmission paths controlled by the first switching unit 142, the second switching unit 152, and the third switching unit 162 is in an on state at any time.
In some embodiments, referring to fig. 5, 12 and 13, on the basis that the voltage adjustment circuit includes the second reference voltage supply module 103 and the third reference voltage supply module 104, the first non-inverting input terminal of the first comparison unit 111 includes a plurality of second shift switches 113 as shown in fig. 12, so as to provide different second reference voltages Vref2 to the first non-inverting input terminal of the first comparison unit 111 according to actual requirements; as shown in fig. 12, the second non-inverting input terminal of the second comparing unit 121 includes a plurality of third gear switches 114 for providing different third reference voltages Vref3 to the second non-inverting input terminal of the second comparing unit 121 according to actual requirements; furthermore, referring to fig. 13, a switch turned on or off based on the first control signal op1 is provided on a transmission path between each first preset voltage and the first input terminal of the voltage output module 102, and a switch turned on or off based on the second control signal op2 is provided on a transmission path between each second preset voltage and the first input terminal of the voltage output module 102.
In summary, in the voltage adjustment circuit, the reference voltage generation module 100 generates the first reference voltage Vref1 that varies according to the variation of the ambient temperature Temp, and the comparison module 101 generates the control signal op to enable the voltage output module 102 to use one of the first reference voltage Vref1, the second reference voltage Vref2 and the third reference voltage Vref3 as the first input voltage Vin1 of the voltage output module 102. In this way, in a certain range of ambient temperature interval, the voltage output module 102 takes the first reference voltage Vref1 as the first input voltage Vin1, and can output the output voltage Vout that varies with the ambient temperature Temp based on the first reference voltage Vref1 that varies with the ambient temperature Temp, and in other ambient temperature intervals, the voltage output module 102 takes the second reference voltage Vref2 or the third reference voltage Vref3 as the first input voltage Vin1, and can output the output voltage Vout that is a fixed value based on the second reference voltage Vref2 or the third reference voltage Vref3 that is a fixed value, so as to realize the adjustment of the output voltage Vout based on the ambient temperature, so as to improve the diversity of the output voltage Vout variation.
Another embodiment of the present disclosure also provides a memory including the voltage adjusting circuit provided in an embodiment of the present disclosure. Therefore, the memory can utilize the voltage regulating circuit to generate the output voltage Vout which can be changed based on the change of the ambient temperature so as to meet different requirements of different functional devices in the memory on the power supply voltage, and the performance of the memory is improved.
In some embodiments, the memory may be a DDR memory, such as a DDR4 memory, a DDR5 memory, a DDR6 memory, an LPDDR4 memory, an LPDDR5 memory, or an LPDDR6 memory.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the embodiments of the disclosure. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the embodiments of the disclosure, and the scope of the embodiments of the disclosure should be assessed accordingly to that of the appended claims.

Claims (21)

1. A voltage regulation circuit, comprising:
a reference voltage generation module configured to output a first reference voltage based on an ambient temperature at which the reference voltage generation module is located, the first reference voltage varying with a variation of the ambient temperature;
A comparison module configured to receive the first reference voltage, the second reference voltage, and the third reference voltage, and compare magnitudes of the first reference voltage and the second reference voltage, or compare magnitudes of the first reference voltage and the third reference voltage, to output a control signal representing a comparison result, the second reference voltage and the third reference voltage being different fixed values;
and a voltage output module receiving the first, second and third reference voltages, and using one of the first, second and third reference voltages as a first input voltage of the voltage output module based on the control signal, and outputting an output voltage based on the first input voltage.
2. The voltage regulation circuit of claim 1, wherein the reference voltage generation module is configured to: the first reference voltage is caused to rise as the ambient temperature decreases.
3. The voltage regulation circuit of claim 1, wherein the voltage output module is configured to: if the ambient temperature is greater than a first temperature, taking the received second reference voltage as the first input voltage based on the control signal; if the ambient temperature is less than the first temperature and greater than a second temperature, taking the received first reference voltage as the first input voltage based on the control signal; and if the ambient temperature is smaller than the second temperature, taking the received third reference voltage as the first input voltage based on the control signal.
4. The voltage regulation circuit of claim 3, wherein the first reference voltage is equal to the second reference voltage if the ambient temperature is equal to the first temperature; if the ambient temperature is equal to the second temperature, the first reference voltage is equal to the third reference voltage.
5. The voltage regulation circuit of claim 3, wherein the control signal comprises a first control signal and a second control signal, the comparison module comprising:
a first comparing unit configured to receive the first reference voltage and the second reference voltage and compare magnitudes of the first reference voltage and the second reference voltage to output the first control signal representing a first comparison result;
and a second comparing unit configured to receive the first reference voltage and the third reference voltage and compare magnitudes of the first reference voltage and the third reference voltage to output the second control signal representing a second comparison result.
6. The voltage regulation circuit of claim 5, wherein the voltage output module comprises:
a switching unit configured to receive the first, second, and third reference voltages and output one of the first, second, and third reference voltages as the first input voltage based on the first and second control signals;
And a voltage output unit configured to receive the first input voltage and a second input voltage, which is a feedback voltage provided based on the output voltage, and output the output voltage.
7. The voltage regulation circuit of claim 6, wherein the voltage output unit includes a first input terminal that receives the first input voltage and a second input terminal that receives the second input voltage; the switching unit includes:
a first switching unit configured to turn on or off a transmission path between the first input terminal and the first reference voltage based on the first control signal and the second control signal;
a second switching unit configured to turn on or off a transmission path between the first input terminal and the second reference voltage based on the first control signal;
and a third switching unit configured to turn on or off a transmission path between the first input terminal and the third reference voltage based on the second control signal.
8. The voltage regulation circuit of claim 7, wherein the first control signal and the second control signal vary based on a change in the ambient temperature, the first switching unit comprising a logic determination circuit configured to: outputting a third control signal based on the first control signal and the second control signal, wherein the output third control signal is at a high level if the ambient temperature is less than the first temperature and greater than the second temperature; and if the ambient temperature is higher than the first temperature or lower than the second temperature, outputting the third control signal at a low level.
9. The voltage regulation circuit of claim 8, wherein the first switching unit is configured to: if the third control signal is at a high level, a transmission path between the first input end and the first reference voltage is conducted; and if the third control signal is in a low level, switching off a transmission path between the first input end and the first reference voltage.
10. The voltage regulation circuit of claim 8, wherein the first comparison unit includes a first positive input and a first negative input, the first positive input receiving the second reference voltage and the first negative input receiving the first reference voltage; the first comparing unit is configured to: if the ambient temperature is greater than the first temperature, the second reference voltage is greater than the first reference voltage, and the first control signal is at a high level; and if the ambient temperature is less than the first temperature, the second reference voltage is less than the first reference voltage, and the first control signal is in a low level.
11. The voltage regulation circuit of claim 10, wherein the second switching unit is configured to: if the first control signal is at a high level, a transmission path between the first input end and the second reference voltage is conducted; and if the first control signal is in a low level, switching off a transmission path between the first input end and the second reference voltage.
12. The voltage regulation circuit of claim 10, wherein the second comparison unit includes a second positive input and a second negative input, the second positive input receiving the third reference voltage, the second negative input receiving the first reference voltage; the second comparing unit is configured to: if the ambient temperature is greater than the second temperature, the third reference voltage is greater than the first reference voltage, and the second control signal is at a high level; and if the ambient temperature is less than the second temperature, the third reference voltage is less than the first reference voltage, and the second control signal is at a low level.
13. The voltage regulation circuit of claim 12, wherein the third switching unit is further configured to: if the second control signal is at a high level, switching off a transmission path between the first input end and the third reference voltage; and if the second control signal is in a low level, a transmission path between the first input end and the third reference voltage is conducted.
14. The voltage regulator circuit according to claim 12, wherein the logic determination circuit comprises an exclusive or circuit, and wherein if the first control signal and the second control signal are both high, the third control signal output from the exclusive or circuit is low; if the first control signal is at a low level, the second control signal is at a high level, and the third control signal output by the exclusive or gate circuit is at a high level; and if the first control signal and the second control signal are both in a low level, the third control signal output by the exclusive or gate circuit is in a low level.
15. The voltage regulation circuit of claim 10, wherein the second comparison unit includes a second positive input and a second negative input, the second positive input receiving the first reference voltage and the second negative input receiving the third reference voltage; the second comparing unit is configured to: if the ambient temperature is greater than the second temperature, the first reference voltage is less than the third reference voltage, and the second control signal is at a low level; and if the ambient temperature is smaller than the second temperature, the first reference voltage is larger than the third reference voltage, and the second control signal is in a high level.
16. The voltage regulation circuit of claim 15, wherein the third switching unit is further configured to: if the second control signal is at a high level, a transmission path between the first input end and the third reference voltage is conducted; and if the second control signal is in a low level, switching off a transmission path between the first input end and the third reference voltage.
17. The voltage regulator circuit according to claim 15, wherein the logic determination circuit comprises a nor gate circuit, and the third control signal output by the nor gate circuit is low if the first control signal is high and the second control signal is low; if the first control signal and the second control signal are both low level, the third control signal output by the nor gate circuit is high level; and if the first control signal is at a low level, the second control signal is at a high level, and the third control signal output by the NOR gate is at a low level.
18. The voltage regulation circuit of claim 8, wherein the first comparison unit includes a first positive input and a first negative input, the first positive input receiving the first reference voltage and the first negative input receiving the second reference voltage; the first comparing unit is configured to: if the ambient temperature is greater than the first temperature, the first reference voltage is less than the second reference voltage, and the first control signal is at a low level; if the ambient temperature is less than the first temperature, the first reference voltage is greater than the second reference voltage, and the first control signal is at a high level;
the second switching unit is configured to: if the ambient temperature is greater than the first temperature, conducting a transmission path between the first input end and the second reference voltage based on the first control signal; and if the ambient temperature is smaller than the first temperature, switching off a transmission path between the first input end and the second reference voltage based on the first control signal.
19. A voltage regulation circuit as claimed in any one of claims 1 to 3, further comprising: the second reference voltage supply module comprises at least two second gear switches, and one second gear switch corresponds to a first preset voltage; the second reference voltage supply module is configured to selectively turn on the second gear switch to output the first preset voltage as the second reference voltage.
20. A voltage regulation circuit as claimed in any one of claims 1 to 3, further comprising: the third reference voltage supply module comprises at least two third gear switches, and one third gear switch corresponds to a second preset voltage; the third reference voltage supply module is configured to selectively turn on the third gear switch and output the second preset voltage as the third reference voltage.
21. A memory comprising a voltage regulation circuit as claimed in any one of claims 1 to 20.
CN202211132202.2A 2022-09-16 2022-09-16 Voltage regulating circuit and memory thereof Pending CN117762180A (en)

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JP5361182B2 (en) * 2007-12-21 2013-12-04 株式会社東芝 Semiconductor memory device
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KR20130015940A (en) * 2011-08-05 2013-02-14 에스케이하이닉스 주식회사 Semiconductor memory device comprising teperature test circuit
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JP2021082094A (en) * 2019-11-21 2021-05-27 ウィンボンド エレクトロニクス コーポレーション Voltage generation circuit and semiconductor device using the same

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