Title :
A MOSFET-only second order delta-sigma modulator for capacitive sensor interfaces
Author :
Cama, J. M Gómez ; Bota, S.A. ; Montané, E. ; Samitier, J.
Author_Institution :
Dept. d´´Electron., Barcelona Univ., Spain
Abstract :
A 14-bit MOSFET-only 2nd order Δ-Σ modulator has been implemented in a 0.7 μm CMOS process for capacitive sensors interfaces. A switched capacitor architecture that allows the substitution of linear capacitors by MOS capacitors has been developed. These circuits have low cost fabrication, small area, and high matching. This proposal was tested comparing two different Δ-Σ modulators, one with linear capacitors and the MOS-only version. Similar results were obtained for both modulators
Keywords :
CMOS integrated circuits; capacitive sensors; delta-sigma modulation; integrated circuit design; modulators; signal processing equipment; switched capacitor networks; Δ-Σ modulator; 0.7 micron; 14 bit; MOS capacitors; MOSFET-only delta-sigma modulator; capacitive sensor interfaces; high matching; low cost fabrication; second order delta-sigma modulator; switched capacitor architecture; CMOS technology; Capacitance; Capacitive sensors; Circuit testing; Costs; Delta modulation; MOS capacitors; MOSFET circuits; Switches; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.814500
