Method and system for all digital gain control

Details Method and system for all digital gain control Method and system for all digital gain control

2007-06-19

2007-06-19

Ha, Dac V. (Department: 2611)

Pulse or digital communications

Pulse code modulation

Correcting or reducing quantizing errors

C375S245000, C375S246000, C341S110000, C341S200000, C704S230000

Reexamination Certificate

active

10330749

ABSTRACT:
An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.

REFERENCES:
patent: 4025732 (1977-05-01), Traunmüller
patent: 4124773 (1978-11-01), Elkins
patent: 4132985 (1979-01-01), Kitaura
patent: 4189625 (1980-02-01), Strandberg
patent: 4250470 (1981-02-01), Szarvas
patent: 4903020 (1990-02-01), Wermuth et al.
patent: 5446761 (1995-08-01), Nag et al.
patent: 5572452 (1996-11-01), Ostman et al.
patent: 6577262 (2003-06-01), Veillette
patent: 2003/0002576 (2003-01-01), Whitehead et al.
patent: 0 595 406 (1993-10-01), None
patent: 06-164390 (1994-06-01), None
patent: 06-244887 (1994-09-01), None
patent: 09-098036 (1997-04-01), None
patent: 12-236276 (2000-08-01), None
patent: 2000 236276 (2000-08-01), None

Affiliated with

Also associated with

Rating

Method and system for all digital 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 Method and system for all digital gain control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for all digital gain control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3872587