Title :
On switched-current Δ-Σ A/D converters
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Sweden
fDate :
30 Apr-3 May 1995
Abstract :
Switched-current oversampling Δ-Σ A/D converters are the ideal choice for mixed analog/digital design due to their complete compatibility with digital CMOS process and high tolerance to process variation. This paper discusses all the aspects of switched-current oversampling A/D converters, including structures, circuits, and practical issues. Three different modulator structures and six different types of switched-current circuits were used in our design and implementation with an emphasis on low-voltage operation. Four 3.3-V oversampling A/D converters were implemented and measured, and another four 3.3-V and one 1.2-V oversampling A/D converters were also implemented but are yet to be measured
Keywords :
CMOS integrated circuits; analogue processing circuits; mixed analogue-digital integrated circuits; modulators; sigma-delta modulation; signal sampling; switched current circuits; 1.2 V; 3.3 V; cascoded SI circuits; digital CMOS process compatibility; low-voltage operation; mixed analog/digital design; modulator structures; process variation tolerance; switched-current oversampling Δ-Σ A/D converters; CMOS process; Clocks; Delay; Delta modulation; Design optimization; Feedback circuits; Switched capacitor circuits; Switching circuits; Switching converters; Voltage;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.523832
