Variable gain amplifier

Details Variable gain amplifier Variable gain amplifier

2005-06-21

2005-06-21

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Signal feedback

Variable impedance in feedback path varied by separate...

C330S282000

Reexamination Certificate

active

06909323

ABSTRACT:
A variable gain amplifier device comprises a variable gain amplifier circuit which amplifies a difference between an input signal and a feedback signal to output an output signal, a feedback circuit which supplies the feedback signal to the variable gain amplifier circuit, and a controller which controls the variable gain amplifier circuit and the feedback circuit to decrease a cutoff frequency of the feedback circuit according to increase of a gain of the variable gain amplifier circuit or vice versa.

REFERENCES:
patent: 4034308 (1977-07-01), Wermuth et al.
patent: 4072906 (1978-02-01), Schroder
patent: 4873492 (1989-10-01), Myer
patent: 4884141 (1989-11-01), Hyakutake
patent: 5128629 (1992-07-01), Trinh
patent: 5451904 (1995-09-01), Terada et al.
patent: 5697074 (1997-12-01), Makikallio et al.
patent: 6014180 (2000-01-01), Kawano
patent: 6208209 (2001-03-01), Ng
patent: 6437643 (2002-08-01), Ueno et al.
patent: 0 541 243 (1993-05-01), None
patent: 56-143714 (1981-11-01), None
Remco J. Wiegerink, et al., “Offset Cancelling Circuit”, IEEE Journal of Solid-State Circuits, vol. 24, No. 3, Jun. 1989, pp. 651-658.
Jarkko Jussila, et al., “A Channel Selection Filter for a WCDMA Direct Conversion Receiver”, Proceedings of ESSCIRC '00, Sep. 2000, pp. 236-239.

Affiliated with

Also associated with

Rating

Variable gain amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable gain amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable gain amplifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3490183