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

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...

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

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