Amplifier circuit including single capacitor for dc...

Details Amplifier circuit including single capacitor for dc... Amplifier circuit including single capacitor for dc...

H - Electricity

03

F

330/21

H03F 3/45 (2006.01) H03F 1/08 (2006.01) H03F 1/34 (2006.01) H03F 3/68 (2006.01)

Patent

CA 1284189

Abstract In an amplifier circuit, there are provided a preamplifier, a first differential-input amplifier and a second differential-input amplifier. An AC negative feedback path is formed betwenn the output terminal of the preamplifier and the inverting input terminal thereof. The inverting input terminal is connected to a ground via a RC series circuit. An input signal containing a DC voltage component is supplied via the junction of the RC series circuit to the inverting input terminal. A voltage appearing at this junction is applied to both the first and second differetial-input amplifiers as a reference voltage.

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