Control circuit for reducing DC gain of internal module of computer

Abstract

The invention discloses a control circuit for reducing DC gain of an internal module of a computer. The control circuit comprises a diode D1, a capacitor C1, a resistor R1, an operational amplifier U1, a capacitor C2 and a resistor R2, wherein one end of the capacitor C2 is respectively connected to one end of alternating current Ui, a resistor R5 and a cathode of the diode D2 and the other end of the capacitor C2 is respectively connected to the resistor R2, an anode of the diode D2 and a non-inverting terminal of the operational amplifier U1; an inverting terminal of the operational amplifier U1 is respectively connected to the resistor R1 and a resistor R3; and the other end of the resistor R1 is connected to the capacitor C1. The control circuit adopts design of the single operational amplifier U1 and introduces DC complete feedback and AC partial feedback, when the AC voltage gain is larger, the DC voltage gain is very small, so that the saturation of the operational amplifier due to input offset current is avoided, and furthermore, the voltage stabilizing diode D1 is arranged to clamp the maximal amplitude of the voltage at the output end in order to suppress the DC offset.

Description

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AI Technical Summary

Benefits of technology

The technical purpose described in this patented technology uses an improved version of Op-Amplifier (OpA) circuit called Single Ompum Design or LMU designed for better performance at high voltages compared to previous designs. This allows it to achieve more precise control over electrical characteristics such as impedance values and minimizing power consumption during operation.

Problems solved by technology

The technical problem addressed in this patented text relates to how to filter out unwanted electrical noise caused by electronic devices such as computers while still maintaining their effectiveness at high-frequency analog circuits (AC).

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