A Voltage Source Circuit Based on Operational Amplifier Bootstrap and Feedback Circuit

A technology of operational amplifiers and feedback circuits, which can be applied to instruments, electric variable adjustment, control/regulation systems, etc., and can solve the problem that DC voltage excitation cannot take into account both large voltage output range and high voltage output accuracy.

Active Publication Date: 2021-07-27
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing DC voltage excitation cannot take into account the large voltage output range and high voltage output accuracy, the present invention provides a voltage source circuit based on the bootstrap and feedback circuit of the operational amplifier, which adds a push-pull output to the output stage The circuit achieves a larger voltage output range, larger current output capability, high precision, and significantly improves the load capacity of the voltage source circuit

Method used

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  • A Voltage Source Circuit Based on Operational Amplifier Bootstrap and Feedback Circuit
  • A Voltage Source Circuit Based on Operational Amplifier Bootstrap and Feedback Circuit
  • A Voltage Source Circuit Based on Operational Amplifier Bootstrap and Feedback Circuit

Examples

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Embodiment 1

[0021] Such as figure 1 As shown, a voltage source circuit based on an operational amplifier bootstrap and feedback circuit, including a digital-to-analog conversion excitation source, an operational amplifier bootstrap and feedback topology network circuit, and a push-pull output topology network circuit;

[0022] The output terminal of the digital-to-analog conversion excitation source is connected to the input terminal of the operational amplifier bootstrap and feedback topology network circuit, and is used to provide a control circuit for the operational amplifier bootstrap and feedback topology network circuit, so that the The circuit digital controllable of the above-mentioned digital-to-analog conversion excitation source;

[0023] The output terminal of the operational amplifier bootstrap and feedback topology network circuit is connected to the input terminal of the push-pull output topology network circuit; at the same time, the operational amplifier bootstrap and fe...

Embodiment 2

[0036] Such as figure 2 As shown, an operational amplifier bootstrap and feedback topology network circuit provided in this embodiment, the operational amplifier bootstrap and feedback topology network circuit includes an operational amplifier A1, a positive high voltage power supply HV+, a negative high voltage power supply HV-, a positive voltage Rail power supply NMOS tube Q1, negative voltage rail power supply PMOS tube Q2, same-direction amplification proportional resistor R1, same-direction amplification proportional resistor R2, resistor R15, resistor R16, positive voltage rail regulator ZD1, negative voltage rail regulator ZD2;

[0037] The positive input terminal of the operational amplifier A1 is connected to the output terminal of the output stage buffer circuit, and the excitation source for the digital-to-analog conversion is used for the bootstrap and feedback topology network of the operational amplifier through the output stage buffer circuit The circuit provi...

Embodiment 3

[0052] Such as image 3 As shown, this embodiment also provides another operational amplifier bootstrap and feedback topology network circuit. Specifically, the operational amplifier bootstrap and feedback topology network circuit includes an operational amplifier A2, a positive high-voltage power supply HV+, and a negative high-voltage power supply HV -, positive voltage rail power supply NMOS tube Q3, negative voltage rail power supply PMOS tube Q4, positive feedback proportional resistor R3, positive feedback proportional resistor R4, negative feedback resistor R5, resistor R17, resistor R18, positive voltage rail regulator tube ZD3, negative Voltage rail regulator tube ZD4;

[0053] The positive pole of the positive high-voltage power supply HV+ is connected to the positive power supply terminal of the operational amplifier A2 through the positive voltage rail power supply NMOS transistor Q3 in turn, and the positive pole of the positive high-voltage power supply HV+ is al...

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PUM

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Abstract

The invention discloses a voltage source circuit based on an operational amplifier bootstrap and feedback circuit, including a digital-to-analog conversion excitation source, an operational amplifier bootstrap and feedback topology network circuit, a push-pull output topology network circuit; a digital-to-analog conversion excitation source, It is used to provide a control circuit for the operational amplifier bootstrap and feedback topology network circuit, making the voltage source circuit digitally controllable; at the same time, the operational amplifier bootstrap and feedback topology network circuit realizes negative voltage by collecting the output node voltage of the push-pull output topology network circuit. Feedback ensures that the push-pull output topology network circuit outputs a constant voltage value; the operational amplifier bootstrap and feedback topology network circuit adjusts the voltage rail through bootstrap to achieve a wide range of voltage output, and through the push-pull The output topology network circuit realizes the voltage output above 100V and the current output above 1A. The invention realizes a wide range of voltage output and relatively large current output, significantly improves the load capacity of the voltage source circuit, and on this basis, takes into account the high precision of the voltage source output.

Description

technical field [0001] The invention relates to the technical field of program-controlled power supplies, and more specifically, to a voltage source circuit based on an operational amplifier bootstrap and feedback circuit. Background technique [0002] In the field of measurement, in order to provide the required excitation signal for the device under test, a high-precision voltage source structure is generally required, but the current common high-precision voltage source can only provide voltage signals with a small output range, and once the output voltage range Increase, the power supply ripple and other issues under high voltage will often be highlighted again, unable to provide accurate measurement. [0003] In a traditional voltage excitation source circuit, an operational amplifier is generally used to sample and feed back the output node voltage to stabilize the voltage on the output node. However, the output voltage of the common follower or the same-phase proport...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/46G05F1/575G05F1/569
CPCG05F1/461G05F1/468G05F1/569G05F1/575
Inventor 王自鑫李文哲陈弟虎韩海涛侯林汛胡德林张锡斌
Owner SUN YAT SEN UNIV
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