Realization method and device for multifunctional operational amplifier sampling front-end circuit

Abstract

The invention discloses a realization method and device for a multifunctional operational amplifier sampling front-end circuit. The method comprises the following steps of respectively configuring thesampling front-end circuit according to functions needing to be realized; and drawing the sampling front-end circuit on a PCB, and selectively welding peripheral devices of an operational amplifier according to the functions needing to be realized in order to realize the corresponding functions. The device comprises an input interface end, a middle conversion end and a voltage stabilization output end. The method and the device have the advantages of being simple to operate, good in universality and wide in application range and capable of realizing various sampling circuit functions.

Description

technical field [0001] The invention relates to the technical field of sampling front-end circuits, in particular to a method and device for realizing a multi-functional operational amplifier sampling front-end circuit. Background technique [0002] At present, with the increasing requirements of the stability of the circuit, the design index of the feedback circuit becomes more and more stringent, and the sampling circuit is an important part of the feedback circuit, and its sampling performance directly affects the performance of the feedback circuit. The overall effect; the sampling circuit is connected to the sampling element at the key node of the circuit, and the circuit parameters are obtained through the sampling element to achieve the purposes of monitoring, feedback, and control. Sampling front-end circuits based on operational amplifiers are favored by engineers due to their large input impedance, small output impedance, and high gain; This function has the follo...

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Problems solved by technology

[0003] (1) It can only meet the requirements of a single function, but cannot meet the current diversified requirements for sampling front-end circuit functions;

[0004] (2) Due to its poor versatility and poor versatility in use, it cannot be applied to many different applications, and it will also cause a lot of waste in development costs;

[0005] (3) In order to realize other different functions, it needs to be disassembled and reinstalled. Due to the complex structure of the feedback circuit, it is very inconvenient to disassemble and install, and special equipment tools are required for operation

[0006] To sum up, the current single function limitation of the sampling front-end circuit based on the operational amplifier has become one of the current bottlenecks restricting the design of the feedback circuit. At present, it is urgent to provide a method that can realize the sampling front-end circuit of the operational amplifier with multiple functions. and installation

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