Differential amplifier

Details Differential amplifier Differential amplifier

2007-06-19

2007-06-19

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S258000

Reexamination Certificate

active

11197992

ABSTRACT:
A differential amplifier comprises an operational amplifier, comprising a positive output terminal, a negative output terminal, and a feedback terminal; a common mode sensing circuit coupled to the positive output terminal and the negative output terminal, for generating a sensed common mode voltage of the positive output terminal and the negative output terminal of the operational amplifier; and a feedback circuit comprising a common mode input terminal for receiving the sensed common mode voltage, a reference input terminal for receiving a reference voltage, and a first resistive component coupled between the common mode input terminal and the reference input terminal, the feedback circuit generating a feedback signal according to the common mode voltage and the reference voltage; wherein the feedback terminal of the operational amplifier receives the feedback signal of the feedback circuit.

REFERENCES:
patent: 4823092 (1989-04-01), Pennock
patent: 5436594 (1995-07-01), Pace et al.
patent: 5668468 (1997-09-01), Cargill
patent: 6356152 (2002-03-01), Jezdic et al.

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