Highly linear variable gain amplifier

Details Highly linear variable gain amplifier Highly linear variable gain amplifier

2007-04-10

2007-04-10

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S279000

Reexamination Certificate

active

11066546

ABSTRACT:
A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers to amplify complementary portions of a differential input signal. By using two single-ended amplifiers instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.

REFERENCES:
patent: 5327098 (1994-07-01), Molina et al.
patent: 5429105 (1995-07-01), Bennett et al.
patent: 6052030 (2000-04-01), Garner et al.
patent: 6265936 (2001-07-01), Heigl et al.

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