Sigma-delta analog-to-digital converters based on switched-capac

Details Sigma-delta analog-to-digital converters based on switched-capac Sigma-delta analog-to-digital converters based on switched-capac

1991-05-14

1992-08-18

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341172, 333173, H03M 300

Patent

active

051403250

ABSTRACT:
Sigma-delta analog to digital converters based upon switched capacitor delay and switched capacitor differentiator circuits are described. These switched capacitor circuits have the advantages that they are less sensitive to clock feed-through noise, dc offset voltage and power supply voltage, etc. Design examples of one-bit second-order sigma-delta analog digital converter are given to substantiate both design methodology, circuit features and the utility of these new circuit structures.

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Norsworthy; "Oversampled Sigma-Delta Data Converters"; ISCAS '90 Workshop; 30 Apr. 1990; New Orleans, La.
Temes et al.; "A Tutorial Discussion of an Oversampling Method for A/D and D/A Conversion", IEEE International Symposium on Circuits and Systems, May 1990, pp. 910-913.
Yu et al., "Realizations of IIR/FIR and N-Path Filters Using a Novel Switch Capacitor Technique", IEEE Transaction on Circuits and Systems, Jan. 1990, vol. 37, No. 1, pp. 91-106.
Wu et al., "Realizations of FIR and IIR Filters Using SC Differentiators", in Proc. Symp. on VLSI Circuits, Japan 1988, pp. 99-100.

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