Series capacitive component for switched-capacitor circuits...

Details Series capacitive component for switched-capacitor circuits... Series capacitive component for switched-capacitor circuits...

2005-08-09

2005-08-09

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S143000, C333S173000

Reexamination Certificate

active

06927722

ABSTRACT:
A series capacitive component for use in signal processing applications such as analog-to-digital (A/D) converters, switched capacitor circuits and the like that require matched capacitors is presented. A series capacitive component consists of multiple capacitors connected in series. By utilizing series capacitive components in integrated circuits, significantly lower loads are provided for the same resulting capacitor mismatch range as previous solutions. Additionally, for the same load and noise, using series capacitive components provides a substantially reduced match over previous solutions. Thus a circuit designer has more flexibility when making tradeoffs between circuit area and capacitor mismatch and therefore manufacturing yields.

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patent: 6147551 (2000-11-01), Hong
Sauerbrey et al.; A 0.7-V MOSFET-Only Switched-Opamp Sigma-Delta Modulator in Standard Digital CMOS Technology, IEEE Journal of Solid-State Circuits, vol. 37 No. 12, Dec. 2002, pp. 1662-1669.
Hayt, Jr. et al., Engineering Circuit Analysis, 1978, Mc-Graw Hill, p. 155.
Hong, Merit, “The Reduction of Sampling Noise in Switched-Capacitor Circuits through Spatial Oversampling,” IEEE International Symposium on Circuits and Systems 2002, Scottsdale, AZ, 5 pp.

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