Device and method for eliminating feedback common mode signals

Details Device and method for eliminating feedback common mode signals Device and method for eliminating feedback common mode signals

2011-03-28

2011-11-08

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S260000, C330S069000

Reexamination Certificate

active

08054133

ABSTRACT:
A device and a method for eliminating feedback common mode signals are provided, which belong to the electronic technology field. The device includes an operational amplifier circuit with two output ends. The two output ends are a first output end and a second output end. The device also includes a feedback unit. The feedback unit is configured to receive level signals of the first output end and the second output end of the operational amplifier circuit, and superpose feedback common mode signals to input ends of the operational amplifier circuit according to states of the level signals. The method includes: the feedback unit receives level signals of a first output end and a second output end of an operational amplifier circuit, and superposes feedback common mode signals to the input ends of the operational amplifier circuit according to the states of the level signals. Thus, the feedback common mode signals of the operational amplifier circuit are stabilized, the requirements for the operational amplifier circuit are lowered, and the performance of the operational amplifier circuit is improved.

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