Title :
A substrate-referenced data-conversion architecture
Author :
Allstot, David J. ; Black, William C., Jr.
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
10/1/1991 12:00:00 AM
Abstract :
A substrate-referenced (SR) data-conversion architecture that operates with widely varying single polarity and or bipolar power supplies has been developed. By using well-established analog circuit design techniques and a novel substrate-referenced level-shifting scheme, digital switching noise on the noisiest power supply (V dd in p-well CMOS) appears to the analog subsystem as a common-mode signal that is substantially rejected. Substrate-referenced successive-approximation weighted-capacitor analog-to-digital (A/D) converters have been implemented in p-well CMOS technology for several VLSI mixed-mode applications. A conventional ground-referenced converter was also integrated in the same technology for one specific application. With identical static logic circuitry on both chips, the SR architecture exhibited significantly higher accuracy than the conventional architecture
Keywords :
CMOS integrated circuits; VLSI; analogue-digital conversion; application specific integrated circuits; VLSI mixed-mode applications; analog circuit design techniques; bipolar power supplies; common-mode signal; digital switching noise; ground-referenced converter; p-well CMOS; single-polarity power supplies; static logic circuitry; substrate-referenced data-conversion architecture; substrate-referenced level-shifting scheme; successive-approximation weighted-capacitor A/D convertors; Analog circuits; CMOS digital integrated circuits; CMOS technology; Circuit noise; Integrated circuit technology; Noise level; Power supplies; Signal design; Strontium; Switching circuits;
Journal_Title :
Circuits and Systems, IEEE Transactions on
