Amplifier circuit including single capacitor for DC differential

Details Amplifier circuit including single capacitor for DC differential Amplifier circuit including single capacitor for DC differential

1988-05-26

1989-10-03

Mullins, James B.

Amplifiers

Sum and difference amplifiers

330 84, 330258, H03F 345

Patent

active

048719765

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 between 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 differential-input amplifiers as a reference voltage.

REFERENCES:
patent: 4446441 (1984-05-01), Fujibayashi

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