Switched-capacitor sigma-delta analog-to-digital converter with

Details Switched-capacitor sigma-delta analog-to-digital converter with Switched-capacitor sigma-delta analog-to-digital converter with

1998-03-18

2000-03-21

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341172, 327337, H03M 300, H03M 112

Patent

active

06040793&

ABSTRACT:
A sigma-delta analog-to-digital converter includes an integrator having an input and an output and an integrator capacitor connected between the input and output. A switched-capacitor input circuit includes at least one input capacitor, an input sampling switching circuit and an input delivery switching circuit. The input sampling switching circuit includes at least one input sampling switch operable to connect the input capacitor to be charged by an input voltage at a sampling rate. The input delivery switching circuit includes at least one input delivery switch operable to connect the input capacitor to transfer charge to the integrator capacitor at a first transfer rate. A switched-capacitor feedback circuit is connected in a feedback path between the input and output of the integrator. The feedback circuit includes at least one feedback capacitor, a feedback sampling switching circuit and a feedback delivery switching circuit. The feedback sampling switching circuit includes at least one feedback sampling switch operable to connect the feedback capacitor to be charged by a feedback reference voltage at the sampling rate. The feedback delivery switching circuit includes at least one feedback delivery switch operable to connect the feedback capacitor to transfer charge to the integrator capacitor at a second transfer rate. The second transfer rate is a predetermined factor greater than the first transfer rate such that the sampled feedback reference voltage charge is transferred to the integrator capacitor at a greater rate than the transfer of the sampled input voltage charge to prevent modulator instability due to an input overload condition.

REFERENCES:
patent: 4851841 (1989-07-01), Sooch
patent: 5134401 (1992-07-01), McCartney et al.
patent: 5198817 (1993-03-01), Walden et al.
patent: 5479130 (1995-12-01), McCartney
patent: 5563597 (1996-10-01), McCartney
patent: 5634202 (1997-05-01), Connell et al.
patent: 5745060 (1998-04-01), McCartney et al.
patent: 5872469 (1999-02-01), Nestler

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-733858