Bias balancing circuit

Details Bias balancing circuit Bias balancing circuit

2011-03-29

2011-03-29

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S279000

Reexamination Certificate

active

07915955

ABSTRACT:
The invention discloses a bias balancing circuit. The bias balancing circuit is used for balancing an output voltage outputted by an amplifier module. The amplifier module has a variable gain. The bias balancing circuit comprises a comparator and a voltage selector. The comparator is used for comparing the output voltage and a reference voltage, to generate a comparison signal. The voltage selector is used for generating a selected voltage according to the comparison signal. When the variable gain is changed to result in an offset from the output voltage to the reference voltage, the bias balancing circuit is capable of balancing the output voltage toward the reference voltage by the selected voltage.

REFERENCES:
patent: 5083096 (1992-01-01), Miyazaki
patent: 5194823 (1993-03-01), Wendt et al.
patent: 6788138 (2004-09-01), Suzuki
patent: 6977550 (2005-12-01), Ishida et al.
patent: 7495513 (2009-02-01), Dally et al.
patent: 7595692 (2009-09-01), Ishida

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