DC dither circuitry and method for delta-sigma modulator

Details DC dither circuitry and method for delta-sigma modulator DC dither circuitry and method for delta-sigma modulator

1997-05-08

1998-11-10

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

341118, H03M 110

Patent

active

058350381

ABSTRACT:
A characteristic tone in a delta-sigma analog-to-digital converter is shifted out of an audible pass band without diminishing dynamic range or signal-to-noise ratio thereof by operating the digital-to-analog converter to measure its offset voltage. If the amplitude of the measured offset voltage exceeds a predetermined value, no dither signal is applied to the input of the delta-sigma modulator. If the measured offset voltage is less than the predetermined value, a positive DC dither voltage is added to the input voltage of the delta-sigma modulator if the measured offset voltage is positive, or is subtracted if the measured offset voltage is negative.

REFERENCES:
patent: 4509037 (1985-04-01), Harris
patent: 4855745 (1989-08-01), Smither
patent: 4916449 (1990-04-01), Kubo et al.
patent: 5057840 (1991-10-01), Ledzius et al.
patent: 5144308 (1992-09-01), Norsworthy
patent: 5200750 (1993-04-01), Fushiki et al.
patent: 5357252 (1994-10-01), Ledzius et al.
patent: 5408233 (1995-04-01), Gannon et al.
patent: 5416481 (1995-05-01), Chen
patent: 5424739 (1995-06-01), Norsworthy et al.
patent: 5483238 (1996-01-01), Norsworthy
patent: 5530442 (1996-06-01), Norsworthy et al.
patent: 5561424 (1996-10-01), Norsworthy et al.

Affiliated with

Also associated with

Rating

DC dither circuitry and method for delta-sigma modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with DC dither circuitry and method for delta-sigma modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC dither circuitry and method for delta-sigma modulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1520744