Gain control for delta sigma analog-to-digital converter

Details Gain control for delta sigma analog-to-digital converter Gain control for delta sigma analog-to-digital converter

2008-01-01

2008-01-01

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S091000, C327S092000, C327S094000, C327S095000, C327S096000, C327S336000, C327S337000, C327S344000, C327S345000

Reexamination Certificate

active

10816266

ABSTRACT:
Gain control for delta sigma analog-to-digital converter. A method is disclosed for driving the input of an integrator in a delta-sigma converter having an amplifier with a non-inverting input, an output and a positive input connected to a reference voltage and an integration capacitor connected between the non-inverting input and the output. An input voltage is sampled at a first rate onto an input sampling capacitor and then charge is dumped from the input sampling capacitor to the non-inverting input of the amplifier at a second time and at the first rate. A reference voltage is sampled onto a feedback sampling capacitor at substantially the first rate, and charge stored on the feedback sampling capacitor is dumped to the non-inverting input of the amplifier at a second rate different than the first rate. The amount of time that charge is dumped from the feedback sampling capacitor is controlled to be substantially equal to the amount of time that charge is being dumped from the input sampling capacitor, wherein varying the second rate relative to the first rate changes the gain of delta-sigma converter.

REFERENCES:
patent: 3931604 (1976-01-01), Treynor
patent: 4365204 (1982-12-01), Haque
patent: 4429285 (1984-01-01), Bradshaw
patent: 5134401 (1992-07-01), McCartney et al.
patent: 5159341 (1992-10-01), McCartney et al.
patent: 5293169 (1994-03-01), Baumgartner et al.
patent: 5341050 (1994-08-01), Mellissinos et al.
patent: 5352972 (1994-10-01), Pernici et al.
patent: 5376936 (1994-12-01), Kerth et al.
patent: 5698999 (1997-12-01), Etoh et al.
patent: 5736895 (1998-04-01), Yu et al.
patent: 5892473 (1999-04-01), Shin
patent: 6037887 (2000-03-01), Wu et al.
patent: 6107871 (2000-08-01), Shin
patent: 6313668 (2001-11-01), Savage
patent: 6344767 (2002-02-01), Cheung et al.
patent: 6437720 (2002-08-01), Yin et al.
patent: 6445331 (2002-09-01), Stegers
patent: 6509852 (2003-01-01), Todsen et al.
patent: 6549066 (2003-04-01), Martin
patent: 6590517 (2003-07-01), Swanson
patent: 6617908 (2003-09-01), Thomsen et al.
patent: 6636084 (2003-10-01), Sarraj
patent: 6720799 (2004-04-01), Gupta
patent: 2002/0190788 (2002-12-01), Ramesh et al.
patent: 0084353 (1983-07-01), None
patent: 0889597 (1999-01-01), None
Rudolf F. Graf, Modern Dictionary of Electronics; 1978 ; Zilog, inc; fifth edition; p. 125.
“Supplemental European Search Report,” European Patent Office, EP Application No. 05 73 5518, Jul. 2, 2007, pp. 1-2.

Affiliated with

Also associated with

Rating

Gain control for delta sigma analog-to-digital converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gain control for delta sigma analog-to-digital converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain control for delta sigma analog-to-digital converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3931447