CN115016588B - Start-up circuit and start-up method for band gap reference circuit - Google Patents
Start-up circuit and start-up method for band gap reference circuit Download PDFInfo
- Publication number
- CN115016588B CN115016588B CN202210867099.XA CN202210867099A CN115016588B CN 115016588 B CN115016588 B CN 115016588B CN 202210867099 A CN202210867099 A CN 202210867099A CN 115016588 B CN115016588 B CN 115016588B
- Authority
- CN
- China
- Prior art keywords
- transistor
- circuit
- enabling
- electrode
- feedback
- 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
Links
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 application relates to a starting circuit and a starting method for a band gap reference circuit. A start-up circuit for a bandgap reference circuit, comprising: a pre-start circuit and a feedback circuit respectively connected with the bandgap reference circuit, the pre-start circuit configured to: responding to the conduction of the initial control signal to transmit starting current to the band gap reference circuit and control the band gap reference circuit to start; the feedback circuit is configured to: and detecting the feedback voltage of the band gap reference circuit, and outputting an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off. According to the starting circuit for the band gap reference circuit, when the feedback circuit judges that the band gap reference circuit is stable according to the feedback voltage, the pre-starting circuit is controlled to be turned off, so that the power consumption of the starting circuit is reduced. In addition, the starting circuit for the band gap reference circuit only comprises a feedback circuit and a pre-starting circuit, so that the structure of the starting circuit is simplified.
Description
Technical Field
The present application relates to the field of integrated circuits, and in particular, to a starting circuit and a starting method for a bandgap reference circuit.
Background
In large scale integrated circuit systems, bandgap reference circuits are an essential part. The bandgap reference circuit provides a low temperature drift reference voltage and current bias for the integrated circuit system. Thus, the start-up circuit for the bandgap reference circuit is directly related to whether the bandgap reference circuit can start up normally and operate stably.
However, in the existing starting circuit for the bandgap reference circuit, there are problems that the starting circuit is complex in structure, large in power consumption and loss, and the like.
Therefore, how to simplify the start-up circuit and reduce the power consumption of the start-up circuit is a problem to be solved.
Disclosure of Invention
Based on this, it is necessary to provide a start-up circuit and a start-up method for a bandgap reference circuit, so as to effectively simplify the start-up circuit and reduce the power consumption of the start-up circuit.
To achieve the above object, an embodiment of the present application provides a start-up circuit for a bandgap reference circuit, including: a pre-start circuit and a feedback circuit respectively connected with the bandgap reference circuit, the pre-start circuit configured to: responding to the conduction of the initial control signal to transmit starting current to the band gap reference circuit and control the band gap reference circuit to start; the feedback circuit is configured to: and detecting the feedback voltage of the band gap reference circuit, and outputting an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off.
The starting circuit for the band gap reference circuit is connected with the band gap reference circuit, and the band gap reference circuit is conducted in response to the initial control signal, so that stable starting of the band gap reference circuit is realized. The feedback circuit is connected with the band gap reference circuit, can detect the feedback voltage of the band gap reference circuit, controls the pre-starting circuit to be turned off when the band gap reference circuit is judged to be stable according to the feedback voltage so as to reduce the power consumption of the starting circuit, and controls the pre-starting circuit to be turned on when the band gap reference circuit is judged to be abnormal according to the feedback voltage so as to provide restarting current at any time, and further can control the band gap reference circuit to be restarted at any time. In addition, the starting circuit for the band gap reference circuit only comprises a feedback circuit and a pre-starting circuit, so that the structure of the starting circuit is simplified.
Optionally, the pre-start-up circuit is multiplexed as a stabilizing circuit; the feedback circuit is further configured to: the feedback voltage after the band gap reference circuit is started is monitored, the stabilizing circuit is controlled to be conducted when the feedback voltage is larger than a first threshold value, and the stabilizing circuit is controlled to be turned off when the feedback voltage is smaller than a second threshold value; the stabilizing circuit is further configured to: and after the conduction, the compensation current is transmitted to the band gap reference circuit so as to control the band gap reference circuit to be stable.
The start-up circuit for the bandgap reference circuit described above may be multiplexed into the stabilizing circuit when the pre-start-up circuit starts up the bandgap reference circuit in response to the initial control signal and is turned off. At this time, when the feedback voltage of the bandgap reference circuit detected by the feedback circuit is greater than the first threshold value, which indicates that the bandgap reference circuit fluctuates, the feedback circuit may control the stabilizing circuit to be turned on so as to provide a current (i.e. transmit a compensation current) to the bandgap reference circuit, and the auxiliary bandgap reference circuit is stabilized again. When the feedback voltage of the band gap reference circuit detected by the feedback circuit is smaller than the second threshold value, the band gap reference circuit is indicated to run stably, and the stabilizing circuit is controlled to be turned off or kept to be turned off, so that the power consumption of the starting circuit is reduced.
Optionally, the start-up circuit for the bandgap reference circuit further comprises: a first enabling circuit, coupled to the bandgap reference circuit, configured to: controlling a first bias voltage of the bandgap reference circuit in response to the first enable signal; a second enabling circuit, coupled to the feedback circuit, configured to: controlling a second bias voltage of the feedback circuit in response to the second enable signal; a third enabling circuit, coupled to the pre-start-up circuit, configured to: responding to a third enabling signal, and transmitting initial starting current to the pre-starting circuit when the third enabling signal is a first state signal, so that the pre-starting circuit transmits starting current to the band gap reference circuit according to the initial starting current after being conducted; the second enabling signal and the third enabling signal are the same, and the second enabling signal and the third enabling signal are reverse signals of the first enabling signal.
Optionally, the bandgap reference circuit comprises: the transistor comprises a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a first triode, a second triode and an amplifier; the grid electrode of the first transistor is connected with the grid electrode of the second transistor and the output end of the amplifier, the source electrode of the first transistor is connected with the source electrode of the second transistor, the first enabling circuit, the third enabling circuit, the feedback circuit and the first power end, and the drain electrode of the first transistor is connected with the first end of the first resistor and the pre-starting circuit; the drain electrode of the second transistor is connected with the first end of the second resistor, the pre-starting circuit and the reference voltage end; the second end of the first resistor is connected with the first input end of the amplifier and the emitter of the first triode; the second end of the second resistor is connected with the second input end of the amplifier and the first end of the third resistor; the second end of the third resistor is connected with the emitter of the second triode; the base electrode and the collector electrode of the first triode are connected with the second power supply end, the base electrode of the second triode, the collector electrode of the second triode, the feedback circuit and the second enabling circuit.
Optionally, the first enabling circuit includes a first enabling transistor, a gate of the first enabling transistor is connected to the first enabling signal end, a source of the first enabling transistor is connected to the feedback circuit, a source of the first transistor, a source of the second transistor, the third enabling circuit and the first power supply, and a drain of the first enabling transistor is connected to the feedback circuit, the gate of the first transistor, the gate of the second transistor and the output end of the amplifier; the second enabling circuit comprises a second enabling transistor, the grid electrode of the second enabling transistor is connected with a second enabling signal end, the source electrode of the second enabling transistor is connected with the feedback circuit, the base electrode of the first triode, the collector electrode of the first triode, the base electrode of the second triode, the collector electrode of the second triode and the second power supply, and the drain electrode of the second enabling transistor is connected with the feedback circuit; the third enabling circuit comprises a third enabling transistor, the grid electrode of the third enabling transistor is connected with the third enabling signal end, the source electrode of the third enabling transistor is connected with the source electrode of the first transistor, the source electrode of the second transistor, the source electrode of the first enabling transistor, the feedback circuit and the first power supply, and the drain electrode of the third enabling transistor is connected with the pre-starting circuit.
Optionally, the pre-start-up circuit comprises: a third transistor and a fourth transistor; the grid electrode of the third transistor is connected with the feedback circuit, the source electrode of the third transistor is connected with the drain electrode of the second transistor, the first end of the second resistor and the reference voltage end, and the drain electrode of the third transistor is connected with the drain electrode of the fourth transistor and the drain electrode of the third enabling transistor; the grid electrode of the fourth transistor is connected with the feedback circuit, and the source electrode of the fourth transistor is connected with the drain electrode of the first transistor and the first end of the first resistor.
Optionally, the threshold voltages of the third transistor and the fourth transistor do not exceed 200mV.
Optionally, the feedback circuit comprises: a fourth resistor, a fifth transistor, a sixth transistor, and a seventh transistor; the first end of the fourth resistor is connected with the source electrode of the fifth transistor, the source electrode of the first enabling transistor, the source electrode of the second transistor, the source electrode of the first transistor, the source electrode of the third enabling transistor and the first power supply, and the second end of the fourth resistor is connected with the drain electrode of the seventh transistor; the grid electrode of the fifth transistor is connected with the drain electrode of the first enabling transistor, the grid electrode of the first transistor, the grid electrode of the second transistor and the output end of the amplifier, and the drain electrode of the fifth transistor is connected with the grid electrode of the sixth transistor, the drain electrode of the sixth transistor, the grid electrode of the seventh transistor and the source electrode of the second enabling transistor; the source electrode of the sixth transistor is connected with the source electrode of the seventh transistor, the drain electrode of the second enabling transistor, the base electrode of the first triode, the collector electrode of the first triode, the base electrode of the second triode, the collector electrode of the second triode and the second power supply end.
Optionally, the feedback circuit comprises: a feedback transistor, a fifth transistor, a sixth transistor, and a seventh transistor; the grid electrode and the drain electrode of the feedback transistor are connected with the drain electrode of the seventh transistor, and the source electrode of the feedback transistor is connected with the source electrode of the fifth transistor, the source electrode of the first enabling transistor, the source electrode of the second transistor, the source electrode of the first transistor, the source electrode of the third enabling transistor and the first power supply; the grid electrode of the fifth transistor is connected with the drain electrode of the first enabling transistor, the grid electrode of the first transistor, the grid electrode of the second transistor and the output end of the amplifier, and the drain electrode of the fifth transistor is connected with the drain electrode of the sixth transistor and the second bias voltage end; the grid electrode of the sixth transistor is connected with the second bias voltage end, the grid electrode of the seventh transistor and the source electrode of the second enabling transistor, and the source electrode of the sixth transistor is connected with the source electrode of the seventh transistor, the drain electrode of the second enabling transistor, the base electrode of the first triode, the collector electrode of the first triode, the base electrode of the second triode, the collector electrode of the second triode and the second power supply end.
Based on the same inventive concept, the application also provides a starting method for the bandgap reference circuit, which is applied to the circuit in any one of the schemes; the starting method comprises the following steps: the pre-starting circuit is conducted in response to the initial control signal and transmits starting current to the band gap reference circuit so as to control the band gap reference circuit to start; the feedback circuit detects the feedback voltage of the band gap reference circuit and outputs an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off.
According to the starting method for the band-gap reference circuit, the pre-starting circuit responds to the initial control signal to conduct the band-gap reference circuit, so that stable starting of the band-gap reference circuit is realized. The feedback circuit can detect the feedback voltage of the band gap reference circuit, controls the pre-starting circuit to be turned off when the band gap reference circuit is judged to be stable according to the feedback voltage so as to reduce the power consumption of starting the band gap reference circuit, and controls the pre-starting circuit to be turned on when the band gap reference circuit is judged to be abnormal according to the feedback voltage so as to provide restarting current at any time, and further controls the band gap reference circuit to be restarted at any time. In addition, the starting method for the band gap reference circuit only needs a feedback circuit and a pre-starting circuit, so that the circuit structure for starting the band gap reference circuit is simplified.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a block diagram of a start-up circuit for a bandgap reference circuit in accordance with one embodiment;
FIG. 2 is a block diagram of another start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 3 is a block diagram of a start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 4 is a schematic diagram of a signal conversion relationship of a start-up circuit for a bandgap reference circuit according to one embodiment;
FIG. 5 is a circuit diagram of a start-up circuit for a bandgap reference circuit provided in one embodiment;
FIG. 6 is a circuit diagram of another start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 7 is a circuit diagram of yet another start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 8 is a circuit diagram of yet another start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 9 is a timing diagram of a start-up circuit for a bandgap reference circuit provided in one embodiment;
FIG. 10 is a circuit diagram of yet another start-up circuit for a bandgap reference circuit provided in an embodiment;
FIG. 11 is a flowchart of a start-up method for a bandgap reference circuit, in accordance with one embodiment.
Reference numerals illustrate:
a 10-bandgap reference circuit;
20-a start-up circuit; 21-a pre-start-up circuit; a 22-feedback circuit; 23-a stabilizing circuit; 24-a first enabling circuit; 25-a second enabling circuit; 26-a third enabling circuit;
t1-a first transistor; t2-second transistor; t3-a third transistor; t4-fourth transistor; t5-fifth transistor; t6-sixth transistor; t7-seventh transistor; tp—a first enable transistor; a Tn-second enable transistor; a Tc-third enable transistor; a Tf-feedback transistor; i T3 -a current flowing through the third transistor; i T4 -a current through the fourth transistor;
r1-a first resistor; r2-a second resistor; r3-a third resistor; r4-fourth resistor;
q1-a first triode; q2-a second triode;
an A-amplifier; a first input of the I1-amplifier; a second input of the I2-amplifier; an output of the O-amplifier;
1 en-first enable signal/first enable signal terminal; 2 enb-second enable signal/second enable signal terminal; 3enb—third enable signal/third enable signal terminal;
vdd-first power supply terminal/first power supply voltage; vss-second power supply terminal/second power supply voltage; vref-reference voltage terminal/reference voltage;
vbp-a first bias voltage; vbn-first bias voltage.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present disclosure. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
It will be understood that the terms "first," "second," "third," "fourth," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first transistor may be referred to as a second transistor, and similarly, a second transistor may be referred to as a first transistor, without departing from the scope of the application. The first transistor and the second transistor are both transistors, but they are not the same transistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
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. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
In large scale integrated circuit systems, bandgap reference circuits are an essential part. The bandgap reference circuit provides a low temperature drift reference voltage and current bias for the integrated circuit system. Thus, the start-up circuit for the bandgap reference circuit is directly related to whether the bandgap reference circuit can start up normally and operate stably.
However, in the existing starting circuit for the bandgap reference circuit, there are problems that the starting circuit is complex in structure, large in power consumption and loss, and the like.
Therefore, how to simplify the start-up circuit and reduce the power consumption of the start-up circuit is a problem to be solved.
In view of the foregoing drawbacks of the prior art, an object of the present application is to provide a start-up circuit and a start-up method for a bandgap reference circuit, so as to effectively simplify the start-up circuit and reduce the power consumption of the start-up circuit.
Referring to fig. 1, an embodiment of the present application provides a start-up circuit 20 for a bandgap reference circuit 10, comprising: a pre-start-up circuit 21 and a feedback circuit 22 respectively connected to the bandgap reference circuit 10, the pre-start-up circuit 21 being configured to: in response to the initial control signal, conducting to transmit a start-up current to the bandgap reference circuit 10 and control the bandgap reference circuit 10 to start up; the feedback circuit 22 is configured to: the feedback voltage of the bandgap reference circuit 10 is detected and an actual control signal is output according to the feedback voltage to control the pre-start-up circuit 21 to remain on or off.
The start-up circuit for the bandgap reference circuit 10 described above, the pre-start-up circuit 21 is connected to the bandgap reference circuit 10, and turns on the bandgap reference circuit 10 in response to the initial control signal, achieving stable start-up of the bandgap reference circuit 10. The feedback circuit 22 is connected to the bandgap reference circuit 10, and is capable of detecting the feedback voltage of the bandgap reference circuit 10, controlling the pre-start circuit 21 to turn off when the bandgap reference circuit 10 is determined to be stable according to the feedback voltage, so as to reduce the power consumption of the start circuit, and controlling the pre-start circuit 21 to turn on when the bandgap reference circuit 10 is determined to be abnormal according to the feedback voltage, so as to provide a restarting current at any time, and further controlling the bandgap reference circuit 10 to restart at any time. In addition, the start-up circuit for the bandgap reference circuit 10 described above includes only the feedback circuit 22 and the pre-start-up circuit 21, simplifying the structure of the start-up circuit 20.
In some examples, referring to fig. 2, the pre-start-up circuit 21 is multiplexed into the stabilizing circuit 23; the feedback circuit 22 is further configured to: the feedback voltage after the band gap reference circuit 10 is started is monitored, the stabilizing circuit 23 is controlled to be conducted when the feedback voltage is larger than a first threshold value, and the stabilizing circuit 23 is controlled to be turned off when the feedback voltage is smaller than a second threshold value; the stabilizing circuit 23 is further configured to: the compensation current is transmitted to the bandgap reference circuit 10 after being turned on to control the bandgap reference circuit 10 to be stable.
The start-up circuit 20 for the bandgap reference circuit 10 described above, when the pre-start-up circuit 21 turns on the bandgap reference circuit 10 and is turned off in response to the initial control signal, the pre-start-up circuit may be multiplexed as the stabilizing circuit 23. At this time, when the feedback voltage of the bandgap reference circuit 10 detected by the feedback circuit 22 is greater than the first threshold value, which indicates that the bandgap reference circuit 10 fluctuates, the feedback circuit 22 may control the stabilizing circuit 23 to be turned on to supply a current to the bandgap reference circuit (i.e., to transmit a compensation current), and the bandgap reference circuit 10 is assisted to be stabilized again. When the feedback voltage of the bandgap reference circuit 10 detected by the feedback circuit 22 is smaller than the second threshold, which indicates that the bandgap reference circuit 10 is running stably, the stabilizing circuit 23 is controlled to be turned off or kept turned off, which is beneficial to reducing the power consumption of the starting circuit 20.
In some examples, referring to fig. 3, the start-up circuit 20 for the bandgap reference circuit 10 further includes: a first enabling circuit 24, coupled to the bandgap reference circuit 10, configured to: controlling a first bias voltage of the bandgap reference circuit 10 in response to the first enable signal; a second enabling circuit 25, connected to the feedback circuit 22, configured to: controlling a second bias voltage of the feedback circuit 22 in response to the second enable signal; a third enabling circuit 26, connected to the pre-start-up circuit 21, configured to: in response to the third enable signal, when the third enable signal is the first state signal, an initial start-up current is transmitted to the pre-start-up circuit 21, so that the pre-start-up circuit 21 transmits a start-up current to the bandgap reference circuit 10 according to the initial start-up current after being turned on. Referring to fig. 4, the second enable signal 2enb and the third enable signal 3enb are the same, and the second enable signal 2enb and the third enable signal 3enb are inverse signals of the first enable signal 1 en.
In some examples, referring to fig. 5, bandgap reference circuit 10 includes: the first transistor T1, the second transistor T2, the first resistor R1, the second resistor R2, the third resistor R3, the first triode Q1, the second triode Q2 and the amplifier A; the grid electrode of the first transistor T1 is connected with the grid electrode of the second transistor T2 and the output end O of the amplifier A, the source electrode of the first transistor T1 is connected with the source electrode of the second transistor T2, the first enabling circuit 24, the third enabling circuit 26, the feedback circuit 22 and the first power supply Vdd end, and the drain electrode of the first transistor T1 is connected with the first end of the first resistor R1 and the pre-starting circuit 21; the drain electrode of the second transistor T2 is connected with the first end of the second resistor R2, the pre-starting circuit 21 and the reference voltage end Vref; the second end of the first resistor R1 is connected with the first input end I1 of the amplifier A and the emitter of the first triode Q1; the second end of the second resistor R2 is connected with the second input end I2 of the amplifier A and the first end of the third resistor R3; the second end of the third resistor R3 is connected with the emitter of the second triode Q2; the base and collector of the first triode Q1 are connected to the second power supply terminal Vss, the base of the second triode Q2, the collector of the second triode Q2, the feedback circuit 22 and the second enabling circuit 25.
The Vbp is a first bias voltage. The first enable circuit 24 controls the first bias voltage Vbp of the bandgap reference circuit 10 in response to the first enable signal.
Optionally, the first bias voltage Vbp is a voltage of a node connected to the gate of the first transistor T1, the gate of the second transistor T2, and the output terminal O of the amplifier a.
In some examples, referring to fig. 6, the first enabling circuit 24 includes a first enabling transistor Tp, a gate of the first enabling transistor Tp is connected to the first enabling signal terminal 1en, a source of the first enabling transistor Tp is connected to the feedback circuit 22, a source of the first transistor T1, a source of the second transistor T2, the third enabling circuit 26 and the first power supply Vdd, and a drain of the first enabling transistor Tp is connected to the feedback circuit 22, a gate of the first transistor T1, a gate of the second transistor T2 and the output terminal O of the amplifier a; the second enabling circuit 25 includes a second enabling transistor Tn, a gate of the second enabling transistor Tn is connected to the second enabling signal end 2enb, a source of the second enabling transistor Tn is connected to the feedback circuit 22, a base of the first triode Q1, a collector of the first triode Q1, a base of the second triode Q2, a collector of the second triode Q2, and a second power supply, and a drain of the second enabling transistor Tn is connected to the feedback circuit 22; the third enabling circuit 26 includes a third enabling transistor Tc, a gate of the third enabling transistor Tc is connected to the third enabling signal terminal 3enb, a source of the third enabling transistor Tc is connected to the source of the first transistor T1, the source of the second transistor T2, the source of the first enabling transistor Tp, the feedback circuit 22 and the first power supply Vdd, and a drain of the third enabling transistor Tc is connected to the pre-start circuit 21.
In some examples, referring to fig. 7, the pre-start-up circuit 21 includes: a third transistor T3 and a fourth transistor T4; the gate of the third transistor T3 is connected to the feedback circuit 22, the source of the third transistor T3 is connected to the drain of the second transistor T2, the first end of the second resistor R2 and the reference voltage terminal Vref, and the drain of the third transistor T3 is connected to the drain of the fourth transistor T4 and the drain of the third enabling transistor Tc; the gate of the fourth transistor T4 is connected to the feedback circuit 22, and the source of the fourth transistor T4 is connected to the drain of the first transistor T1 and the first end of the first resistor R1.
The threshold voltages of the third transistor T3 and the fourth transistor T4 do not exceed 200mV. For example, the threshold voltage of the third transistor T3 may be 200mV, 160mV, 120mV, 90mV, 50mV, 10mV, and so on. The threshold voltage of the fourth transistor T4 may be 200mV, 160mV, 120mV, 90mV, 50mV, 10mV, and so on.
It should be noted that Vfb is a feedback voltage. The feedback circuit 22 detects the feedback voltage Vfb of the bandgap reference circuit 10 and outputs an actual control signal according to the feedback voltage Vfb to control the pre-start-up circuit 21 to remain on or off.
In some examples, referring to fig. 8, feedback circuit 22 includes: a fourth resistor R4, a fifth transistor T5, a sixth transistor T6, and a seventh transistor T7; the first end of the fourth resistor R4 is connected to the source of the fifth transistor T5, the source of the first enabling transistor Tp, the source of the second transistor T2, the source of the first transistor T1, the source of the third enabling transistor Tc and the first power supply Vdd, and the second end of the fourth resistor RR4 is connected to the drain of the seventh transistor T7; the gate of the fifth transistor T5 is connected to the drain of the first enabling transistor Tp, the gate of the first transistor T1, the gate of the second transistor T2 and the output terminal O of the amplifier a, and the drain of the fifth transistor T5 is connected to the gate of the sixth transistor T6, the drain of the sixth transistor T6, the gate of the seventh transistor T7 and the source of the second enabling transistor Tn; the source of the sixth transistor T6 is connected to the source of the seventh transistor T7, the drain of the second enabling transistor Tn, the base of the first transistor Q1, the collector of the first transistor Q1, the base of the second transistor Q2, the collector of the second transistor Q2, and the second power supply terminal Vss.
The Vbn is the second bias voltage. The second enable circuit 25 controls the second bias voltage Vbn of the feedback circuit 22 in response to the second enable signal 2 enb.
Optionally, the second bias voltage Vbn is a voltage of a node connected to the gate of the sixth transistor T6, the drain of the sixth transistor T6, and the source of the second enable transistor Tn.
Optionally, the feedback voltage Vfb is a voltage of a node connected to the gate of the third transistor T3, the gate of the fourth transistor T4, the second end of the fourth resistor R4, and the drain of the seventh transistor T7.
In an alternative embodiment, referring to fig. 8 and 9, in the initial stage, the first enable signal 1en is low, the first bias voltage Vbp is pulled up to the first power voltage Vdd by the first enable circuit 24, the second bias voltage Vbn is pulled down to the second power voltage Vss by the second enable circuit 25, the third enable transistor Tc is in an off state, no current flows through the third transistor T3 and the fourth transistor T4, I T3 ＝I T4 =0, i.e. the pre-start-up circuit 21 is turned off, the bandgap reference circuit 10 is in the off state. When the first enable signal 1en becomes high level and the third enable signal 3enb becomes low level, the third enable transistor Tc starts to be turned on; the feedback voltage Vfb is initially high, so that the third transistor T3 and the fourth transistor T4 start to be turned on; the third enabling transistor Tc, the third transistor T3 flows into the second resistor R2, the third resistor R3 and the second transistor Q2, and the fourth transistor T4 flows into the first resistor R1 and the first transistor Q1 through the third enabling transistor Tc, where the value of the first resistor R1 is equal to the value of the second resistor R2. The third transistor T3 and the fourth transistor T4 provide an initial start-up current for the bandgap reference circuit 10, i.e. the pre-start-up circuit 21 is turned on in response to an initial control signal to transmit the start-up current to the bandgap reference circuit 10 and control the bandgap reference circuit 10 to start up. After the bandgap reference circuit 10 is stably started, the reference voltage Vref gradually increases, the first bias voltage Vbp gradually decreases from the first power supply voltage Vdd, the first transistor T1, the second transistor T2 and the fifth transistor T5 start to flow current, the sixth transistor T6 is self-biased, and after the sixth transistor T6 has current, the seventh transistor T7 also has current, where the size of the seventh transistor T7 needs to be relatively large, so as to ensure that the feedback voltage Vfb is finally stabilized at a relatively low level. When the feedback voltage Vfb decreases from near the first power supply voltage Vdd to near the second power supply voltage Vss, the third transistor T3 and the fourth transistor T4 in the pre-start-up circuit 21 are turned off, i.e., the pre-start-up circuit 21 is turned off.
When the band gap reference circuit 10 stably works, the voltage of two nodes A, B in the band gap reference circuit 10 is about 1.2V, and the feedback voltage Vfb is approximately equal to 0, and at the moment, vgs3 and Vgs4 are far smaller than the starting voltage, so that the band gap reference circuit 10 can be well cut off. Where Vgs3 represents the voltage between the gate and the source of the third transistor T3 and Vgs4 represents the voltage between the gate and the source of the fourth transistor T4. After the bandgap reference circuit 10 starts the stable establishment, the bandgap reference circuit 10 may maintain loop stability itself. When the bandgap reference circuit 10 is subjected to external influences, such as dynamic static discharge, an unstable state may occur, and the bandgap reference circuit 10 cannot work normally, and at this time, no current or very small current flows in the first transistor Q1 and the second transistor Q2, the current flowing through the sixth transistor T6 also becomes small, the current flowing in the seventh transistor T7 becomes small, the feedback voltage Vfb increases, so that the third transistor T3 and the fourth transistor T4 of the stabilizing circuit 23 are turned on again, and the current is injected (i.e. the compensation current is transmitted) to the first transistor Q1 and the second transistor Q2 again to assist the bandgap reference circuit 10 to stabilize again. After the bandgap reference circuit 10 is re-stabilized, the third transistor T3 and the fourth transistor T4 are turned off as described above, and the operation of the bandgap reference circuit 10 is not affected.
In some examples, feedback circuit 22 may also take other configurations. Referring to fig. 10, the feedback circuit 22 includes: a feedback transistor Tf, a fifth transistor T5, a sixth transistor T6, and a seventh transistor T7; the grid electrode and the drain electrode of the feedback transistor Tf are connected with the drain electrode of the seventh transistor T7, and the source electrode of the feedback transistor Tf is connected with the source electrode of the fifth transistor T5, the source electrode of the first enabling transistor Tp, the source electrode of the second transistor T2, the source electrode of the first transistor T1, the source electrode of the third enabling transistor Tc and the first power supply Vdd; the grid electrode of the fifth transistor T5 is connected with the drain electrode of the first enabling transistor Tp, the grid electrode of the first transistor T1, the grid electrode of the second transistor T2 and the output end O of the amplifier A, and the drain electrode of the fifth transistor T5 is connected with the drain electrode of the sixth transistor T6 and the second bias voltage end; the gate of the sixth transistor T6 is connected to the second bias voltage terminal, the gate of the seventh transistor T7 and the source of the second enabling transistor Tn, and the source of the sixth transistor T6 is connected to the source of the seventh transistor T7, the drain of the second enabling transistor Tn, the base of the first transistor Q1, the collector of the first transistor Q1, the base of the second transistor Q2, the collector of the second transistor Q2 and the second power supply terminal Vss.
For example, referring to fig. 10, the third transistor T3 and the fourth transistor T4 only have current flowing during a period of time when the circuit is on, and the current level in the seventh transistor T7 and the fourth resistor R4 is mainly determined by the resistor R4. In order to reduce the circuit area, compared with the foregoing embodiment using the fourth resistor R4, the present embodiment may replace the fourth resistor R4 with the feedback transistor Tf, that is, the feedback transistor Tf in fig. 10 may replace the fourth resistor R4 in fig. 8, and on the premise of the same resistance value, the area of the feedback transistor Tf may be much smaller than the fourth resistor R4, so that the area may be reduced while the starting circuit of the bandgap reference circuit achieves low power consumption.
Based on the same inventive concept, please refer to fig. 11, the present application also provides a starting method for a bandgap reference circuit, which is applied to the circuit according to any one of the foregoing schemes; the starting method comprises the following steps:
s10: the pre-starting circuit is conducted in response to the initial control signal and transmits starting current to the band gap reference circuit so as to control the band gap reference circuit to start;
s20: the feedback circuit detects the feedback voltage of the band gap reference circuit and outputs an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off.
According to the starting method for the band-gap reference circuit, the pre-starting circuit responds to the initial control signal to conduct the band-gap reference circuit, so that stable starting of the band-gap reference circuit is realized. The feedback circuit can detect the feedback voltage of the band gap reference circuit, controls the pre-starting circuit to be turned off when the band gap reference circuit is judged to be stable according to the feedback voltage so as to reduce the power consumption of starting the band gap reference circuit, and controls the pre-starting circuit to be turned on when the band gap reference circuit is judged to be abnormal according to the feedback voltage so as to provide restarting current at any time, and further controls the band gap reference circuit to be restarted at any time. In addition, the starting method for the band gap reference circuit only needs a feedback circuit and a pre-starting circuit, so that the circuit structure for starting the band gap reference circuit is simplified.
In some examples, the feedback circuit further monitors the feedback voltage after the bandgap reference circuit is started, controls the stabilizing circuit to turn on when the feedback voltage is greater than a first threshold, and controls the stabilizing circuit to turn off when the feedback voltage is less than a second threshold; the stabilizing circuit also transmits compensation current to the band gap reference circuit after being conducted so as to control the band gap reference circuit to be stabilized.
In some examples, the start-up method for the bandgap reference circuit further comprises: the first enabling circuit is used for responding to the first enabling signal and controlling a first bias voltage of the band gap reference circuit; the second enabling circuit responds to the second enabling signal and controls a second bias voltage of the feedback circuit; the third enabling circuit responds to the third enabling signal, and when the third enabling signal is the first state signal, initial starting current is transmitted to the pre-starting circuit, so that the pre-starting circuit transmits starting current to the band gap reference circuit according to the initial starting current after being conducted; the second enabling signal and the third enabling signal are the same, and the second enabling signal and the third enabling signal are reverse signals of the first enabling signal.
According to the starting method for the band gap reference circuit, when the feedback voltage of the band gap reference circuit detected by the feedback circuit is larger than the first threshold value, the feedback circuit controls the stable circuit to be conducted so as to provide restarting current, namely, the transmission compensation current, and further controls the band gap reference circuit to restart stably. When the feedback voltage of the band gap reference circuit detected by the feedback circuit is smaller than the second threshold value, the band gap reference circuit is started stably, and the feedback circuit controls the stabilizing circuit to be turned off so as to reduce the power consumption of the starting circuit.
In the description of the present specification, the technical features of the above-described embodiments may be arbitrarily combined, and for brevity of description, all possible combinations of the technical features of the above-described embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.
The above examples merely represent a few embodiments of the present disclosure, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the following claims.
Claims (8)
1. A start-up circuit for a bandgap reference circuit, comprising: a pre-starting circuit and a feedback circuit which are respectively connected with the band gap reference circuit,
the pre-start-up circuit is configured to: responding to an initial control signal to conduct so as to transmit starting current to the band gap reference circuit and control the band gap reference circuit to start;
the feedback circuit is configured to: detecting the feedback voltage of the band gap reference circuit, and outputting an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off;
the pre-starting circuit is multiplexed into a stabilizing circuit;
the feedback circuit is further configured to: monitoring the feedback voltage of the band gap reference circuit after starting, controlling the stable circuit to be turned on when the feedback voltage is larger than a first threshold value, and controlling the stable circuit to be turned off when the feedback voltage is smaller than a second threshold value;
the stabilizing circuit is further configured to: transmitting compensation current to the band gap reference circuit after conducting so as to control the band gap reference circuit to be stable;
the start-up circuit further comprises:
a first enabling circuit, coupled to the bandgap reference circuit, configured to: controlling a first bias voltage of the bandgap reference circuit in response to a first enable signal;
a second enabling circuit, coupled to the feedback circuit, configured to: controlling a second bias voltage of the feedback circuit in response to a second enable signal;
a third enabling circuit, coupled to the pre-start-up circuit, configured to: transmitting an initial starting current to the pre-starting circuit when the third enabling signal is a first state signal in response to a third enabling signal, so that the pre-starting circuit transmits the starting current to the band gap reference circuit according to the initial starting current after being conducted;
wherein the second enable signal and the third enable signal are the same, and the second enable signal and the third enable signal are inverse signals of the first enable signal.
2. The start-up circuit for a bandgap reference circuit as claimed in claim 1, wherein said bandgap reference circuit comprises: the transistor comprises a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a first triode, a second triode and an amplifier;
the grid electrode of the first transistor is connected with the grid electrode of the second transistor and the output end of the amplifier, the source electrode of the first transistor is connected with the source electrode of the second transistor, the first enabling circuit, the third enabling circuit, the feedback circuit and the first power end, and the drain electrode of the first transistor is connected with the first end of the first resistor and the pre-starting circuit;
the drain electrode of the second transistor is connected with the first end of the second resistor, the pre-starting circuit and the reference voltage end;
the second end of the first resistor is connected with the first input end of the amplifier and the emitter of the first triode;
the second end of the second resistor is connected with the second input end of the amplifier and the first end of the third resistor;
the second end of the third resistor is connected with the emitter of the second triode;
the base electrode and the collector electrode of the first triode are connected with a second power supply end, the base electrode of the second triode, the collector electrode of the second triode, the feedback circuit and the second enabling circuit.
3. A start-up circuit for a bandgap reference circuit as claimed in claim 2, wherein,
the first enabling circuit comprises a first enabling transistor, a grid electrode of the first enabling transistor is connected with a first enabling signal end, a source electrode of the first enabling transistor is connected with the feedback circuit, a source electrode of the first transistor, a source electrode of the second transistor, the third enabling circuit and the first power supply, and a drain electrode of the first enabling transistor is connected with the feedback circuit, the grid electrode of the first transistor, the grid electrode of the second transistor and the output end of the amplifier;
the second enabling circuit comprises a second enabling transistor, a grid electrode of the second enabling transistor is connected with a second enabling signal end, a source electrode of the second enabling transistor is connected with the feedback circuit, a base electrode of the first triode, a collector electrode of the first triode, a base electrode of the second triode, a collector electrode of the second triode and the second power supply, and a drain electrode of the second enabling transistor is connected with the feedback circuit;
the third enabling circuit comprises a third enabling transistor, the grid electrode of the third enabling transistor is connected with a third enabling signal end, the source electrode of the third enabling transistor is connected with the source electrode of the first transistor, the source electrode of the second transistor, the source electrode of the first enabling transistor, the feedback circuit and the first power supply, and the drain electrode of the third enabling transistor is connected with the pre-starting circuit.
4. A start-up circuit for a bandgap reference circuit as claimed in claim 3, wherein said pre-start-up circuit comprises: a third transistor and a fourth transistor;
the grid electrode of the third transistor is connected with the feedback circuit, the source electrode of the third transistor is connected with the drain electrode of the second transistor, the first end of the second resistor and the reference voltage end, and the drain electrode of the third transistor is connected with the drain electrode of the fourth transistor and the drain electrode of the third enabling transistor;
the grid electrode of the fourth transistor is connected with the feedback circuit, and the source electrode of the fourth transistor is connected with the drain electrode of the first transistor and the first end of the first resistor.
5. The startup circuit for a bandgap reference circuit of claim 4, wherein the threshold voltages of said third transistor and said fourth transistor are no more than 200mV.
6. A start-up circuit for a bandgap reference circuit as claimed in claim 3, wherein said feedback circuit comprises: a fourth resistor, a fifth transistor, a sixth transistor, and a seventh transistor;
the first end of the fourth resistor is connected with the source electrode of the fifth transistor, the source electrode of the first enabling transistor, the source electrode of the second transistor, the source electrode of the first transistor, the source electrode of the third enabling transistor and the first power supply, and the second end of the fourth resistor is connected with the drain electrode of the seventh transistor;
the grid electrode of the fifth transistor is connected with the drain electrode of the first enabling transistor, the grid electrode of the first transistor, the grid electrode of the second transistor and the output end of the amplifier, and the drain electrode of the fifth transistor is connected with the grid electrode of the sixth transistor, the drain electrode of the sixth transistor, the grid electrode of the seventh transistor and the source electrode of the second enabling transistor;
the source electrode of the sixth transistor is connected with the source electrode of the seventh transistor, the drain electrode of the second enabling transistor, the base electrode of the first triode, the collector electrode of the first triode, the base electrode of the second triode, the collector electrode of the second triode and the second power supply end.
7. A start-up circuit for a bandgap reference circuit as claimed in claim 3, wherein said feedback circuit comprises: a feedback transistor, a fifth transistor, a sixth transistor, and a seventh transistor;
the grid electrode and the drain electrode of the feedback transistor are connected with the drain electrode of the seventh transistor, and the source electrode of the feedback transistor is connected with the source electrode of the fifth transistor, the source electrode of the first enabling transistor, the source electrode of the second transistor, the source electrode of the first transistor, the source electrode of the third enabling transistor and the first power supply;
the grid electrode of the fifth transistor is connected with the drain electrode of the first enabling transistor, the grid electrode of the first transistor, the grid electrode of the second transistor and the output end of the amplifier, and the drain electrode of the fifth transistor is connected with the drain electrode of the sixth transistor and the second bias voltage end;
the gate of the sixth transistor is connected to the second bias voltage terminal, the gate of the seventh transistor and the source of the second enabling transistor, and the source of the sixth transistor is connected to the source of the seventh transistor, the drain of the second enabling transistor, the base of the first triode, the collector of the first triode, the base of the second triode, the collector of the second triode and the second power supply terminal.
8. A start-up method for a bandgap reference circuit, characterized by being applied to a start-up circuit as claimed in any one of claims 1 to 7; the starting method comprises the following steps:
the pre-starting circuit is conducted in response to an initial control signal and transmits starting current to the band gap reference circuit so as to control the band gap reference circuit to start;
the feedback circuit detects the feedback voltage of the band gap reference circuit and outputs an actual control signal according to the feedback voltage so as to control the pre-starting circuit to keep on or off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867099.XA CN115016588B (en) | 2022-07-22 | 2022-07-22 | Start-up circuit and start-up method for band gap reference circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867099.XA CN115016588B (en) | 2022-07-22 | 2022-07-22 | Start-up circuit and start-up method for band gap reference circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115016588A CN115016588A (en) | 2022-09-06 |
| CN115016588B true CN115016588B (en) | 2023-10-10 |
Family
ID=83082210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210867099.XA Active CN115016588B (en) | 2022-07-22 | 2022-07-22 | Start-up circuit and start-up method for band gap reference circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115016588B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116456537B (en) * | 2023-04-28 | 2024-02-02 | 上海晶丰明源半导体股份有限公司 | Interface control circuit, control method and interface control device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367249A (en) * | 1993-04-21 | 1994-11-22 | Delco Electronics Corporation | Circuit including bandgap reference |
| CN101183273A (en) * | 2007-12-14 | 2008-05-21 | 清华大学 | Band-gap reference source produce device |
| JP2011229063A (en) * | 2010-04-22 | 2011-11-10 | Renesas Electronics Corp | Differential amplifier circuit, sample holding circuit, and start-up control method for full differential amplifier circuit |
| JP2012244752A (en) * | 2011-05-19 | 2012-12-10 | Renesas Electronics Corp | Switching regulator and voltage conversion method |
| CN106155160A (en) * | 2015-03-31 | 2016-11-23 | 成都锐成芯微科技有限责任公司 | A kind of band-gap reference circuit with high PSRR characteristic and self-start circuit |
| CN106843363A (en) * | 2017-03-06 | 2017-06-13 | 重庆湃芯微电子有限公司 | A kind of use down than pipe reaction type start-up circuit in band-gap reference circuit |
| CN208335048U (en) * | 2018-07-06 | 2019-01-04 | 上海汉容微电子有限公司 | A kind of voltage regulator circuit |
| CN110703841A (en) * | 2019-10-29 | 2020-01-17 | 湖南国科微电子股份有限公司 | Starting circuit of band-gap reference source, band-gap reference source and starting method |
| CN211979539U (en) * | 2020-05-29 | 2020-11-20 | 杰创智能科技股份有限公司 | Ultra-low power consumption band gap reference circuit of sample hold |
| CN113485505A (en) * | 2021-07-05 | 2021-10-08 | 成都华微电子科技有限公司 | High-voltage low-power-consumption band-gap reference voltage source |
| CN113805634A (en) * | 2021-09-07 | 2021-12-17 | 厦门半导体工业技术研发有限公司 | Band gap reference providing circuit and electronic device |
| CN114265462A (en) * | 2021-12-15 | 2022-04-01 | 成都海光微电子技术有限公司 | Band gap reference, chip, electronic device and electronic equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7224209B2 (en) * | 2005-03-03 | 2007-05-29 | Etron Technology, Inc. | Speed-up circuit for initiation of proportional to absolute temperature biasing circuits |
| US8324944B2 (en) * | 2009-05-29 | 2012-12-04 | Stmicroelectronics Design And Application S.R.O. | Startup circuitry and corresponding method for providing a startup correction to a main circuit connected to a startup circuitry |
| CN111610812B (en) * | 2019-02-26 | 2022-08-30 | 武汉杰开科技有限公司 | Band-gap reference power supply generation circuit and integrated circuit |
-
2022
- 2022-07-22 CN CN202210867099.XA patent/CN115016588B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367249A (en) * | 1993-04-21 | 1994-11-22 | Delco Electronics Corporation | Circuit including bandgap reference |
| CN101183273A (en) * | 2007-12-14 | 2008-05-21 | 清华大学 | Band-gap reference source produce device |
| JP2011229063A (en) * | 2010-04-22 | 2011-11-10 | Renesas Electronics Corp | Differential amplifier circuit, sample holding circuit, and start-up control method for full differential amplifier circuit |
| JP2012244752A (en) * | 2011-05-19 | 2012-12-10 | Renesas Electronics Corp | Switching regulator and voltage conversion method |
| CN106155160A (en) * | 2015-03-31 | 2016-11-23 | 成都锐成芯微科技有限责任公司 | A kind of band-gap reference circuit with high PSRR characteristic and self-start circuit |
| CN106843363A (en) * | 2017-03-06 | 2017-06-13 | 重庆湃芯微电子有限公司 | A kind of use down than pipe reaction type start-up circuit in band-gap reference circuit |
| CN208335048U (en) * | 2018-07-06 | 2019-01-04 | 上海汉容微电子有限公司 | A kind of voltage regulator circuit |
| CN110703841A (en) * | 2019-10-29 | 2020-01-17 | 湖南国科微电子股份有限公司 | Starting circuit of band-gap reference source, band-gap reference source and starting method |
| CN211979539U (en) * | 2020-05-29 | 2020-11-20 | 杰创智能科技股份有限公司 | Ultra-low power consumption band gap reference circuit of sample hold |
| CN113485505A (en) * | 2021-07-05 | 2021-10-08 | 成都华微电子科技有限公司 | High-voltage low-power-consumption band-gap reference voltage source |
| CN113805634A (en) * | 2021-09-07 | 2021-12-17 | 厦门半导体工业技术研发有限公司 | Band gap reference providing circuit and electronic device |
| CN114265462A (en) * | 2021-12-15 | 2022-04-01 | 成都海光微电子技术有限公司 | Band gap reference, chip, electronic device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115016588A (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6404252B1 (en) | No standby current consuming start up circuit | |
| US20060108993A1 (en) | Voltage regulator circuit with a low quiescent current | |
| US5751142A (en) | Reference voltage supply circuit and voltage feedback circuit | |
| US4970408A (en) | CMOS power-on reset circuit | |
| US6998902B2 (en) | Bandgap reference voltage circuit | |
| CN115016588B (en) | Start-up circuit and start-up method for band gap reference circuit | |
| US10884442B2 (en) | Bandgap reference power generation circuit and integrated circuit | |
| CN110703841B (en) | Starting circuit of band-gap reference source, band-gap reference source and starting method | |
| CN109613951B (en) | Band-gap reference source circuit with self-starting circuit | |
| US5987615A (en) | Programmable load transient compensator for reducing the transient response time to a load capable of operating at multiple power consumption levels | |
| KR940009802A (en) | Oscillator Substrate Bias Generator | |
| WO2005101156A1 (en) | Reference voltage generating circuit | |
| US6340852B1 (en) | Voltage generating circuit capable of stably supplying power supply voltage less than rated voltage | |
| US6833742B2 (en) | Starter circuit | |
| JPH10312683A (en) | Voltage adjusting circuit of semiconductor memory element | |
| CN114326906A (en) | Band gap reference circuit | |
| US5610544A (en) | Semiconductor integrated circuit free from through current due to source-voltage drop | |
| US20020169992A1 (en) | Device for reducing power consumption of a monitor and the method therof | |
| JP2001022452A (en) | Source voltage stepping-down circuit | |
| TW202210988A (en) | Shutdown mode for bandgap reference to reduce turn-on time | |
| US6603295B2 (en) | Circuit configuration for the generation of a reference voltage | |
| CN114442713B (en) | Micro-power consumption current reference starting circuit | |
| CN116520926B (en) | Band-gap reference circuit with low power consumption, chip and electronic equipment | |
| CN212276288U (en) | Band gap reference circuit | |
| CN112987842B (en) | Band-gap reference voltage source circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |