Broadband variable gain amplifier with high linearity and...

Details Broadband variable gain amplifier with high linearity and... Broadband variable gain amplifier with high linearity and...

2005-04-19

2005-04-19

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S086000, C330S278000

Reexamination Certificate

active

06882226

ABSTRACT:
A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.

REFERENCES:
patent: 5355096 (1994-10-01), Kobayashi
patent: 5949286 (1999-09-01), Jones
patent: 6285257 (2001-09-01), Abe et al.
patent: 6307433 (2001-10-01), Ikeda
patent: 6667657 (2003-12-01), Nakatani et al.

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