Op amp input compensation capacitor circuit diagram

Published:2011/8/22 22:12:00 Author:Rebekka | Keyword: Op amp, input compensation capacitor | From:SeekIC

General linear amplifier (namely the work of the negative feedback amplifier circuit) input parasitic capacitance will influence the stability of Cs circuit, the compensation measures are shown in the map. The amplifier's input generally exists a few parasitic capacitance Cs. The Cs includes op-amp input capacitance and wiring distributed capacitance. Its feedback resistor Rf can form a lag network and cause output voltage phase lag. When the input signal frequency is high, the bypass action of the Cs makes the amplifier's high frequency response become worse, the frequency band of the upper limit of frequency is about: Omega h = 1 / (2 PI RfCs) .



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