Variable gain amplifier

Details Variable gain amplifier Variable gain amplifier

2007-10-16

2007-10-16

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S311000

Reexamination Certificate

active

11047492

ABSTRACT:
A high frequency amplifier arrangement comprises a first stage with a modulator receiving a baseband signal, and a controllable current shunting device coupled with the modulator; a second stage coupled with the first stage comprising a gain controllable emitter follower; a third stage comprising a gain controllable amplifier coupled with the second stage; and a gain control unit for providing control signals for the first, second and third stage.

REFERENCES:
patent: 6930549 (2005-08-01), Kajiwara et al.
patent: 2004/0092236 (2004-05-01), Irie et al.
patent: 2004/0137862 (2004-07-01), Tanaka et al.

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