CN107894804B - Band-gap reference voltage stabilizing source and system for improving load response characteristic thereof - Google Patents
Band-gap reference voltage stabilizing source and system for improving load response characteristic thereof Download PDFInfo
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- CN107894804B CN107894804B CN201711432616.6A CN201711432616A CN107894804B CN 107894804 B CN107894804 B CN 107894804B CN 201711432616 A CN201711432616 A CN 201711432616A CN 107894804 B CN107894804 B CN 107894804B
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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
- G05F1/561—Voltage to current converters
Abstract
The application discloses a band-gap reference voltage stabilizing source and a system for improving load response characteristics of the band-gap reference voltage stabilizing source. In the application, the low-pass filter has an obstruction effect on the high pulse overshoot or the low pulse overshoot of the base electrode of the first triode, so that the differential signal at the input end of the error amplifier is obviously increased negatively (corresponding to the high pulse overshoot) or positively (corresponding to the low pulse overshoot), the high pulse overshoot or the low pulse overshoot is correspondingly obviously restrained after the differential signal is further amplified by the error amplifier, the working current of the band-gap reference voltage stabilizing source is reduced, the load response of the band-gap reference voltage stabilizing source is improved, and the safety and the reliability are ensured while the low power consumption is ensured.
Description
Technical Field
The application relates to the technical field of voltage stabilizing sources, in particular to a band gap reference voltage stabilizing source and a system for improving load response characteristics of the band gap reference voltage stabilizing source.
Background
Referring to fig. 1, fig. 1 is a schematic structural diagram of a bandgap reference voltage stabilizing source provided by the present application, where the bandgap reference voltage stabilizing source includes a bandgap source core device and an amplifier, the bandgap source core device includes a first triode, a second triode, a first resistor, a second resistor and a triode load, a first output end of the triode load is connected with a collector of the first triode and an inverting input end of an error amplifier respectively, a second output end of the triode load is connected with a collector of the second triode and a non-inverting input end of the error amplifier respectively, an output end of the error amplifier is connected with a base of the first triode and a base of the second triode respectively, a common end of the connection is used as an output end of the bandgap voltage stabilizing source, an emitter of the first triode is connected with an emitter of the second triode and a first end of the second resistor respectively through the first resistor, a second end of the second resistor is grounded, and an area ratio of the first triode to the second triode is n:1.
in order to extend the standby and operating time of the system, it is highly desirable to reduce the quiescent operating current of the bandgap reference regulated source. However, a problem with reducing the quiescent operating current is that the load response becomes so poor as to affect the proper operation of the overall system. Specifically, the load of the voltage stabilizing source is often changed, the transient change of the load can cause output overshoot response, the load current is changed from large to small, and the voltage stabilizing source can output high-pulse overshoot; the load current is changed from small to large, the voltage stabilizing source can output low-pulse overshoot, the overshoot is related to the load current variation, the load variation rate and the design of the band-gap reference voltage stabilizing source, and under the condition that the load current variation and the load variation rate are fixed, the overshoot is approximately inversely proportional to the static working current of the band-gap reference voltage source. The larger the quiescent operating current, the smaller the output overshoot, and the smaller the quiescent operating current, the larger the output overshoot. And as the quiescent operating current decreases, the output overshoot increases, and the overshoot increases to such an extent that the operation of other circuits in the system is abnormal or erroneous, which is unacceptable. In the existing design, considering the safety and reliability of the system, when a trade-off is made between the load response characteristic and the power consumption of the system, a larger static working current is generally adopted in the circuit design, that is, the safety and reliability are selectively ensured, but this necessarily leads to the increase of the power consumption of the system.
Therefore, it is a problem that a person skilled in the art needs to solve at present how to provide a solution for improving the load response of a bandgap reference voltage regulator while reducing the operating current of the bandgap reference voltage regulator.
Disclosure of Invention
The application aims to provide a band-gap reference voltage-stabilizing source and a system for improving the load response characteristic of the band-gap reference voltage-stabilizing source, which can reduce the working current of the band-gap reference voltage-stabilizing source, improve the load response of the band-gap reference voltage-stabilizing source, ensure low power consumption and simultaneously ensure the safety and reliability.
In order to solve the above technical problems, the present application provides a system for improving load response characteristics of a bandgap reference voltage stabilizing source, which is applied to the bandgap reference voltage stabilizing source, and the system comprises:
and the input end of the low-pass filter is respectively connected with the output end of the error amplifier in the band-gap reference voltage stabilizing source and the base electrode of the second triode, and the output end of the low-pass filter is connected with the base electrode of the first triode in the band-gap reference voltage stabilizing source.
Preferably, the low-pass filter is an RC filter, the RC filter includes a filter capacitor and a filter resistor, a first end of the filter resistor is used as an input end of the low-pass filter, a second end of the filter resistor is connected with the filter capacitor, a common end of the filter resistor is used as an output end of the low-pass filter, and a second end of the filter capacitor is grounded.
Preferably, the system further comprises:
and the first end is respectively connected with the output end of the error amplifier, the first end of the low-pass filter and the second end of the fourth resistor is connected with the base electrode of the second triode.
Preferably, the resistance value of the filter resistor is equal to the resistance value of the fourth resistor.
Preferably, the system further comprises a fifth resistor and a sixth resistor, wherein:
the first end of the fifth resistor is connected with the output end of the error amplifier, the second end of the fifth resistor is respectively connected with the first end of the filter resistor, the first end of the fourth resistor and the first end of the sixth resistor, and the second end of the sixth resistor is grounded.
Preferably, the system further comprises a fifth resistor and a sixth resistor, wherein the sixth resistor is arranged between the filter capacitor and the ground, and is further arranged between the second resistor in the band gap reference voltage stabilizing source and the ground, and wherein:
the first end of the fifth resistor is respectively connected with the output end of the error amplifier, the first end of the filter resistor and the first end of the fourth resistor, the second end of the fifth resistor is respectively connected with the second end of the filter capacitor, the second end of the second resistor and the first end of the sixth resistor, and the second end of the sixth resistor is grounded.
In order to solve the technical problems, the application provides a band-gap voltage stabilizing source, which comprises a system for improving the load response characteristic of the band-gap reference voltage stabilizing source.
The application provides a band-gap reference voltage stabilizing source and a system for improving load response characteristics of the band-gap reference voltage stabilizing source.
Therefore, the low-pass filter is arranged between the output end of the error amplifier in the band gap reference voltage stabilizing source and the common end of the base connection of the second triode and the base of the first triode, no matter whether the output of the band gap reference voltage stabilizing source generates high-pulse overshoot or low-pulse overshoot (both are high-frequency signals) due to the rapid change of load current, the current of the base of the second triode can be changed immediately when the high-pulse overshoot or the low-pulse overshoot is generated due to the fact that the low-pass filter generates, meanwhile, the change of the collector current of the first triode can be attenuated due to the blocking effect of the low-pass filter on the high-pulse overshoot or the low-pulse overshoot, so that the differential signal of the input end of the error amplifier is obviously increased (corresponding to the high-pulse overshoot) or is positively increased (corresponding to the low-pulse overshoot), the high-pulse overshoot or the low-pulse overshoot is correspondingly restrained after the error amplifier is further amplified, the working current of the band gap reference voltage stabilizing source is reduced, the load response of the band gap reference voltage stabilizing source is improved, and the safety and the reliability are guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required in the prior art and 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 application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a bandgap reference voltage regulator provided by the present application;
FIG. 2 is a schematic diagram of a system for improving load response characteristics of a bandgap reference voltage regulator according to the present application;
FIG. 3 is a schematic diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application;
FIG. 4 is a schematic diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application;
FIG. 5 is a schematic diagram of another system for improving load response characteristics of a bandgap reference regulated source according to the present application;
fig. 6 is a schematic structural diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application.
Detailed Description
The core of the application is to provide a band-gap reference voltage-stabilizing source and a system for improving the load response characteristic of the band-gap reference voltage-stabilizing source, which can reduce the working current of the band-gap reference voltage-stabilizing source, improve the load response of the band-gap reference voltage-stabilizing source, ensure low power consumption and simultaneously ensure the safety and reliability.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a system for improving load response characteristics of a bandgap reference voltage stabilizing source according to the present application, which is applied to the bandgap reference voltage stabilizing source, and the system includes:
the input end is respectively connected with the output end of the error amplifier B in the band gap reference voltage stabilizing source and the base electrode of the second triode Q2, and the output end is connected with the low-pass filter of the base electrode of the first triode Q1 in the band gap reference voltage stabilizing source.
Specifically, the bandgap reference voltage stabilizing source comprises a bandgap source core device and an amplifier, the bandgap source core device comprises a first triode Q1, a second triode Q2, a first resistor R1, a second resistor R2 and a triode load, a first output end of the triode load is respectively connected with a collector of the first triode Q1 and an inverting input end of an error amplifier B, a second output end of the triode load is respectively connected with a collector of the second triode Q2 and a non-inverting input end of the error amplifier B, an output end of the error amplifier B is respectively connected with a base of the first triode Q1 and a base of the second triode Q2, a public end connected with the public end serves as an output end of the bandgap voltage stabilizing source, an emitter of the first triode Q1 is respectively connected with a first end of the emitter of the second triode Q2 and a first end of the second resistor R2 through the first resistor R1, a second end of the second resistor R2 is grounded, and the area ratio of the first triode Q1 to the second triode Q2 is n:1.
the transistor load may be a resistor pair or a mirror current source pair.
The output of the band gap reference voltage stabilizing source is fed back to the base electrode of the first triode Q1 through a low pass filter, and the output of the band gap reference voltage stabilizing source is directly fed back to the base electrode of the second triode Q2. The output of the band gap source core device is respectively connected with the non-inverting input end and the inverting input end of the error amplifier B, and the signal amplified by the error amplifier B is fed back to the band gap source core device and is used as the output of the band gap reference voltage stabilizing source.
When the load current of the band gap reference voltage stabilizing source is changed from large to small and the voltage stabilizing source outputs high pulse overshoot, the current at the base electrode of the second triode Q2 is increased immediately while the high pulse overshoot is generated because the base electrode of the second triode Q2 is not provided with a low-pass filter, and correspondingly, the current at the collector electrode of the second triode Q2 is also increased immediately; because the base electrode of the first triode Q1 is provided with the low-pass filter, and the high-pulse overshoot is a high-frequency signal, the low-pass filter can block and filter the high-pulse overshoot, and the change of the collector current of the first triode Q1 can be attenuated, so that the differential signal at the input end of the error amplifier B is obviously increased negatively, and the high-pulse overshoot can be obviously restrained after the differential signal is further amplified by the error amplifier B.
When the load current of the band gap reference voltage stabilizing source is changed from small to large and the voltage stabilizing source outputs low-pulse overshoot, the current at the base electrode of the second triode Q2 is immediately reduced while the low-pulse overshoot is generated because the base electrode of the second triode Q2 is not provided with a low-pass filter, and correspondingly, the current at the collector electrode of the second triode Q2 is also immediately reduced; because the base electrode of the first triode Q1 is provided with the low-pass filter, and the low-pulse overshoot is a high-frequency signal, the low-pass filter can block and filter the low-pulse overshoot, and the change of the collector current of the first triode Q1 can be attenuated, so that the differential signal of the input end of the error amplifier B is obviously increased, and the low-pulse overshoot can be obviously restrained after the differential signal is further amplified by the error amplifier B.
Therefore, the addition of the low-pass filter can obviously inhibit overshoot of the output of the band-gap reference voltage stabilizing source caused by the rapid change of the load current, thereby improving the load response characteristic of the band-gap reference voltage stabilizing source.
The application provides a system for improving load response characteristics of a band-gap reference voltage stabilizing source, which is applied to the band-gap reference voltage stabilizing source and comprises a low-pass filter, wherein the input end of the low-pass filter is respectively connected with the output end of an error amplifier in the band-gap reference voltage stabilizing source and the base electrode of a second triode, and the output end of the low-pass filter is connected with the base electrode of a first triode in the band-gap reference voltage stabilizing source.
Therefore, the low-pass filter is arranged between the output end of the error amplifier in the band gap reference voltage stabilizing source and the common end of the base connection of the second triode and the base of the first triode, no matter whether the output of the band gap reference voltage stabilizing source generates high-pulse overshoot or low-pulse overshoot (both are high-frequency signals) due to the rapid change of load current, the current of the base of the second triode can be changed immediately when the high-pulse overshoot or the low-pulse overshoot is generated due to the fact that the low-pass filter generates, meanwhile, the change of the collector current of the first triode can be attenuated due to the blocking effect of the low-pass filter on the high-pulse overshoot or the low-pulse overshoot, so that the differential signal of the input end of the error amplifier is obviously increased (corresponding to the high-pulse overshoot) or is positively increased (corresponding to the low-pulse overshoot), the high-pulse overshoot or the low-pulse overshoot is correspondingly restrained after the error amplifier is further amplified, the working current of the band gap reference voltage stabilizing source is reduced, the load response of the band gap reference voltage stabilizing source is improved, and the safety and the reliability are guaranteed.
The technology of the above embodiment:
referring to fig. 3, fig. 3 is a schematic structural diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application.
As a preferred embodiment, the low-pass filter is an RC filter, the RC filter includes a filter capacitor C1 and a filter resistor R3, a first end of the filter resistor R3 is used as an input end of the low-pass filter, a second end of the filter resistor R3 is connected to the filter capacitor C1, a common end thereof is used as an output end of the low-pass filter, and a second end of the filter capacitor C1 is grounded.
Specifically, the low-pass filter is an RC filter, and includes a filter resistor R3 and a filter capacitor C1. Based on this, the bandgap source core device comprises two feedback loops, one is a positive feedback loop from the first resistor R1, the first transistor Q1 to the inverting input of the error amplifier B, and the other is a negative feedback loop from the second transistor Q2 to the non-inverting input of the error amplifier B. The low-pass filter is added into the positive feedback loop, so that the gain of the high-frequency signal of the positive feedback loop is reduced, and the gain of the band gap source core device under the high-frequency signal is obviously improved. The larger the time constant of the filter capacitor C1 and the filter resistor R3 is, the more obvious the gain of the band gap source core device is at high frequency.
The low-pass filter not only improves the gain of the band-gap voltage-stabilizing source under the high-frequency signal by reducing the gain of the positive feedback loop high-frequency signal, thereby improving the system performance, but also can reduce the band-gap voltage-stabilizing value of the band-gap reference voltage-stabilizing source under the zero temperature coefficient.
Specifically, the following description will take the example that the first transistor Q1 and the second transistor Q2 have the same collector current IC as an example:
firstly, it is to be noted that:
reference output voltage
Wherein V is T The thermal voltage is the current gain of the beta first transistor Q1 and the second transistor Q2.
Thus, the first and second substrates are bonded together,
in order to get an intuitive concept, we assume here V T Has a primary temperature coefficient with beta and has the following relationship:
V T ＝V T0 ×(1+α T ×ΔT)…………………………………(4)
β＝β 0 ×(1+α β ×ΔT)…………………………………(5)
wherein V is T0 Alpha is the thermal voltage at a temperature T0 T The temperature coefficient of the thermal voltage VT is Δt, which is the amount of change in temperature.
β 0 Alpha is the current gain when the temperature is T0 β The temperature coefficient of the current gain, Δt, is the amount of change in temperature.
Thus, formula (3) can be expressed approximately as:
as can be seen from equation (6), due to the addition of the filter resistor R3, deltaV BE The effective value of the band-gap reference voltage stabilizing source is reduced, but the temperature coefficient is improved, the temperature coefficient of the band-gap reference voltage stabilizing source can be improved, the temperature coefficient of the band-gap reference voltage stabilizing source with the original negative temperature coefficient is increased to zero, the working process of the band-gap reference voltage stabilizing source is not affected by temperature, the reliability of the band-gap reference voltage stabilizing source is improved, and meanwhile, the voltage stabilizing value of the band-gap reference voltage stabilizing source can be stabilized at a set value. For example, for those IC manufacturers having a negative temperature coefficient bandgap reference voltage regulator source voltage regulator value greater than 1.25VAccording to the technology, a band gap reference voltage stabilizing source with zero temperature coefficient and a voltage stabilizing value of 1.25V can be obtained by adding a filter resistor R3.
As a preferred embodiment, the system further comprises:
and the first end is respectively connected with the output end of the error amplifier B and the first end of the low-pass filter, and the second end is connected with a fourth resistor R4 of the base electrode of the second triode Q2.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application.
Based on the system shown in fig. 3, the system further adds a fourth resistor R4 to the base of the second triode Q2, which is a balanced design, and under the assumption that the first triode Q1 and the second triode Q2 have the same collector current, in steady state, the collector current of the triode is:
at this time, the liquid crystal display device,
thus, the first and second substrates are bonded together,
as can be seen from formula (9), deltaV BE The effective value is related to (R3-R4), and if (R3-R4) is zero, ΔV BE The theoretical value is kept unchanged, so that the design of the balanced circuit has little influence on the voltage stabilizing value and the temperature coefficient of the band gap source. The values of (R3-R4) can be adjusted as needed in the actual design to obtain the proper system performance. If (R3-R4) is greater than zero, it has the same effect on the bandgap source's voltage regulation as in FIG. 3; if (R3-R4) is less than zero, it has the opposite effect on the bandgap source's voltage regulation as in FIG. 3.
The balanced low-pass filter design shown in fig. 4 provides more flexibility and wider applicability for practical applications.
However, for those integrated circuit processes where the zero temperature coefficient bandgap voltage is at or near 1.25V, the design of fig. 3 must employ a larger filter resistor R3 to achieve good load response characteristics, but this can cause the bandgap voltage to deviate from 1.25V, which may be unacceptable in some situations. And by adopting the design provided by FIG. 4, a larger R3 value can be adopted, and R3-R4 is kept close to zero, so that good load response characteristics can be achieved, and the voltage stabilizing value of the band gap source can be kept at 1.25V.
As a preferred embodiment, the resistance of the filter resistor R3 is equal to the resistance of the fourth resistor R4.
Specifically, the relation between the resistance of the filter resistor R3 and the resistance of the fourth resistor R4 is determined according to the actual situation, and the present application is not particularly limited herein.
As a preferred embodiment, the system further comprises a fifth resistor R5 and a sixth resistor R6, wherein:
the first end of the fifth resistor R5 is connected with the output end of the error amplifier B, the second end of the fifth resistor R5 is respectively connected with the first end of the filter resistor R3, the first end of the fourth resistor R4 and the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is grounded.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application.
As a preferred embodiment, the system further comprises a fifth resistor R5 and a sixth resistor R6, the sixth resistor R6 being arranged between the filter capacitor C1 and ground and between the second resistor R2 in the bandgap reference regulated source and ground, wherein:
the first end of the fifth resistor R5 is connected to the output end of the error amplifier B, the first end of the filter resistor R3, and the first end of the fourth resistor R4, and the second end of the fifth resistor R5 is connected to the second end of the filter capacitor C1, the second end of the second resistor R2, and the first end of the sixth resistor R6, respectively, and the second end of the sixth resistor R6 is grounded.
Referring to fig. 6, fig. 6 is a schematic structural diagram of another system for improving load response characteristics of a bandgap reference voltage regulator according to the present application.
Specifically, the bandgap reference voltage regulator of fig. 5 and 6 can adjust the output voltage by changing the values of the fifth resistor R5 and the sixth resistor R5, which is more flexible.
Specifically, the two voltage-multiplying voltage stabilizing source schemes adopt the design of a low-pass filter, and have an inhibition effect on overshoot of output caused by rapid change of load current.
In order to solve the technical problems, the application provides a band-gap voltage stabilizing source, which comprises the system for improving the load response characteristic of the band-gap reference voltage stabilizing source.
For the description of the bandgap voltage stabilizing source provided by the present application, reference is made to the above embodiments, and the description of the present application is omitted herein.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A system for improving load response characteristics of a bandgap reference voltage regulator, for use with a bandgap reference voltage regulator, comprising:
the input end of the low-pass filter is respectively connected with the output end of the error amplifier in the band-gap reference voltage stabilizing source and the base electrode of the second triode, and the output end of the low-pass filter is connected with the base electrode of the first triode in the band-gap reference voltage stabilizing source;
the band gap reference voltage stabilizing source comprises a band gap source core device and an amplifier, wherein the band gap source core device comprises a first triode, a second triode, a first resistor, a second resistor and a triode load, a first output end of the triode load is respectively connected with a collector of the first triode and an inverting input end of the amplifier, a second output end of the triode load is respectively connected with a collector of the second triode and a non-inverting input end of the amplifier, an output end of the amplifier is respectively connected with a base of the first triode and a base of the second triode, a public end connected with the output end of the band gap reference voltage stabilizing source is used as an output end of the band gap reference voltage stabilizing source, an emitter of the first triode is respectively connected with an emitter of the second triode and a first end of the second resistor through the first resistor, and a second end of the second resistor is grounded;
the output of the band gap reference voltage stabilizing source is fed back to the base electrode of the first triode through the low-pass filter, and the output of the band gap reference voltage stabilizing source is directly fed back to the base electrode of the second triode; the output of the band gap source core device is respectively connected with the non-inverting input end and the inverting input end of the amplifier, and the signal amplified by the amplifier is fed back to the band gap source core device and is used as the output of the band gap reference voltage stabilizing source.
2. The system of claim 1, wherein the low pass filter is an RC filter, the RC filter comprising a filter capacitor and a filter resistor, a first end of the filter resistor being an input of the low pass filter, a second end of the filter resistor being connected to the filter capacitor, a common end of the filter resistor being an output of the low pass filter, and a second end of the filter capacitor being grounded.
3. The system of claim 2, wherein the system further comprises:
and the first end is respectively connected with the output end of the error amplifier, the first end of the low-pass filter and the second end of the fourth resistor is connected with the base electrode of the second triode.
4. The system of claim 3, wherein the filter resistor has a value equal to a value of the fourth resistor.
5. The system of claim 3, further comprising a fifth resistor and a sixth resistor, wherein:
the first end of the fifth resistor is connected with the output end of the error amplifier, the second end of the fifth resistor is respectively connected with the first end of the filter resistor, the first end of the fourth resistor and the first end of the sixth resistor, and the second end of the sixth resistor is grounded.
6. The system of claim 3, further comprising a fifth resistor and a sixth resistor disposed between the filter capacitor and ground and between a second resistor in the bandgap reference voltage regulator source and ground, wherein:
the first end of the fifth resistor is respectively connected with the output end of the error amplifier, the first end of the filter resistor and the first end of the fourth resistor, the second end of the fifth resistor is respectively connected with the second end of the filter capacitor, the second end of the second resistor and the first end of the sixth resistor, and the second end of the sixth resistor is grounded.
7. A bandgap voltage regulator comprising a system for improving the load response characteristics of a bandgap reference voltage regulator as claimed in any one of claims 1 to 6.
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| JP2009165100A (en) * | 2007-12-11 | 2009-07-23 | Hitachi Metals Ltd | High-frequency amplifier, high-frequency module and mobile wireless apparatus using the same |
| JP2014203213A (en) * | 2013-04-03 | 2014-10-27 | トヨタ自動車株式会社 | Band-gap reference circuit |
| CN104460803A (en) * | 2014-12-01 | 2015-03-25 | 无锡中星微电子有限公司 | Band-gap reference voltage generating circuit |
| CN104793672A (en) * | 2014-01-16 | 2015-07-22 | 北京大学 | Low-dropout linear voltage regulator with high power supply rejection ratio |
| CN105824349A (en) * | 2016-05-26 | 2016-08-03 | 上海巨微集成电路有限公司 | Self-calibration band-gap reference circuit and band-gap reference voltage self-calibration system and method |
| CN208027206U (en) * | 2017-12-26 | 2018-10-30 | 上海新进半导体制造有限公司 | Band-gap reference source of stable pressure and improvement band-gap reference source of stable pressure load response specialty systemizations |
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| CN1494209A (en) * | 2002-10-31 | 2004-05-05 | 夏普株式会社 | Amlifying circuit and power apparatus with the same |
| CN1898620A (en) * | 2003-12-24 | 2007-01-17 | 株式会社瑞萨科技 | Voltage generating circuit and semiconductor integrated circuit device |
| JP2009165100A (en) * | 2007-12-11 | 2009-07-23 | Hitachi Metals Ltd | High-frequency amplifier, high-frequency module and mobile wireless apparatus using the same |
| JP2014203213A (en) * | 2013-04-03 | 2014-10-27 | トヨタ自動車株式会社 | Band-gap reference circuit |
| CN104793672A (en) * | 2014-01-16 | 2015-07-22 | 北京大学 | Low-dropout linear voltage regulator with high power supply rejection ratio |
| CN104460803A (en) * | 2014-12-01 | 2015-03-25 | 无锡中星微电子有限公司 | Band-gap reference voltage generating circuit |
| CN105824349A (en) * | 2016-05-26 | 2016-08-03 | 上海巨微集成电路有限公司 | Self-calibration band-gap reference circuit and band-gap reference voltage self-calibration system and method |
| CN208027206U (en) * | 2017-12-26 | 2018-10-30 | 上海新进半导体制造有限公司 | Band-gap reference source of stable pressure and improvement band-gap reference source of stable pressure load response specialty systemizations |
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| Publication number | Publication date |
|---|---|
| CN107894804A (en) | 2018-04-10 |
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