Equal phase multiple gain state amplifier

Details Equal phase multiple gain state amplifier Equal phase multiple gain state amplifier

2006-01-17

2006-01-17

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S310000, C330S311000

Reexamination Certificate

active

06987422

ABSTRACT:
A multiple gain state amplifier that provides advantageous port matching, noise characteristics, and current savings while not imposing a phase shift in the amplifier transfer function between gain states. A multiple gain state amplifier according to the present teachings includes amplifier circuit configured for a first gain state using a first transistor and configured for a second gain state using a second transistor and a circuit for changing the amplifier circuit between the first gain state and the second gain state by selectively applying a bias to the first transistor and a bias to the second transistor.

REFERENCES:
patent: 5903854 (1999-05-01), Abe et al.
patent: 5942946 (1999-08-01), Su et al.
patent: 6501331 (2002-12-01), Adar
patent: 02000101371 (2000-04-01), None

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