Two-stage non-linear filter for analog signal gain control...

Details Two-stage non-linear filter for analog signal gain control... Two-stage non-linear filter for analog signal gain control...

2007-10-02

2007-10-02

Kumar, Pankaj (Department: 2611)

Pulse or digital communications

Receivers

Automatic gain control

C375S229000, C455S241100

Reexamination Certificate

active

10145151

ABSTRACT:
An analog signal gain control circuit(ASGC) for a digital radio HomePlug orthogonal frequency division multiplexing (OFDM) receiver includes a digital variable gain amplifier (DVGA) to control the gain of a received signal to achieve a desired signal amplitude to match a dynamic range of an analog-to-digital converter (ADC), an inverse scaling stage controlled to inverse-scale the signal output by the ADC, and a two-stage fast attack and slow decay filter that outputs control signals to the DVGA and to the inverse scaling stage. The fast attack and slow decay filter rapidly responds to an increase in signal amplitude and slowly decays the amplitude of the control signal in response to a decrease in input signal amplitude.

REFERENCES:
patent: 3716789 (1973-02-01), Brown et al.
patent: 3745374 (1973-07-01), Hecker et al.
patent: 3946211 (1976-03-01), Jenkins, Jr.
patent: 4862387 (1989-08-01), Lee
patent: 4910797 (1990-03-01), Min et al.
patent: 5564080 (1996-10-01), Eul et al.
patent: 5724652 (1998-03-01), Graham et al.
patent: 5873054 (1999-02-01), Warburton et al.
patent: 6091932 (2000-07-01), Langlais
patent: 6122331 (2000-09-01), Dumas
patent: 6194996 (2001-02-01), Okazaki et al.
patent: 6226337 (2001-05-01), Klank et al.
patent: 6229432 (2001-05-01), Fridley et al.
patent: 6242981 (2001-06-01), Tomiyama
patent: 6246285 (2001-06-01), Nishikido
patent: 6369741 (2002-04-01), Demicheli et al.
patent: 6724840 (2004-04-01), Osofsky et al.
patent: 6732059 (2004-05-01), Warburton et al.

Affiliated with

Also associated with

Rating

Two-stage non-linear filter for analog signal gain control... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-stage non-linear filter for analog signal gain control..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage non-linear filter for analog signal gain control... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3844136