Amplifier circuit having nagative feedback loop for self-bias

Details Amplifier circuit having nagative feedback loop for self-bias Amplifier circuit having nagative feedback loop for self-bias

1995-06-27

1997-01-14

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, H03K 345

Patent

active

055943870

ABSTRACT:
An amplifier circuit equipped with a negative feedback loop includes a differential amplifier circuit composed of a plurality of differential amplifier stages, first and second negative feedback circuits each including a low-pass filter and being provided between an associated one of an in-phase output and an opposite-phase output and an associated one of first and second inputs of the differential amplifier circuit. This amplifier circuit further includes a suppression circuit to suppress an a.c. component of a signal to be fed back by adding signals relative to the in-phase and opposite phase outputs.

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