Sigma delta modulator

Details Sigma delta modulator Sigma delta modulator

2005-05-31

2008-09-09

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07423568

ABSTRACT:
A circuit for converting the capacitive signal change of a differential capacitor into digital signals, the circuit including a sigma delta modulator. The differential capacitor is a component of the signal feed structure and the reference feedback structure of the sigma delta modulator.

REFERENCES:
patent: 5454266 (1995-10-01), Chevroulet et al.
patent: 5623432 (1997-04-01), Degrauwe
patent: 7235983 (2007-06-01), O'Dowd et al.
Smith, T. et al., “A 15B Electromechanical Sigma-Delta Converter for Acceleration Measurements”, IEEE International Solid State Circuits Conference, IEEE Inc. New York, vol. 37, Feb. 1, 1994, pp. 160-161, 330.
Kulah, H. et al., “A CMOS switched-capacitor interface for an integrated accelerometer”, Proceedings of the 43rdIEEE Midwest Symposium on Circuits and Systems MWSCAS 2000, Lansing, MI, Aug. 8-11, 2000, Midwest Symposium on Circuits and Systems, New York, vol. 1 of 3, Aug. 8, 2000, pp. 244-247.

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