Title :
A 14-bit MOSFET-only second order delta-sigma modulator for capacitive sensor interfaces
Author :
Cama, J. Ma Górnez ; Montané, E. ; Bota, S.A. ; Samitier, J.
Author_Institution :
Dept. d´´Electron., Barcelona Univ., Spain
Abstract :
A 14-bit MOSFET-only 2n order Δ-ΣΣ modulator for capacitive sensors interfaces has been implemented using a 0.7 um CMOS process. The circuit is based in the substitution of linear capacitors by MOS capacitors in a Switch capacitor architecture. The circuit present low fabrication cost, small area, and high matching. The 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; MOS capacitors; MOSFET circuits; capacitive sensors; delta-sigma modulation; microsensors; switched capacitor networks; 0.7 micron; 14 bit; CMOS process; MOS capacitor; MOSFET; capacitive sensor interface; delta-sigma modulator; microsystems technology; switched capacitor circuit; CMOS process; Capacitive sensors; Costs; Delta modulation; Fabrication; MOS capacitors; Proposals; Switched capacitor circuits; Switches; Switching circuits;
Conference_Titel :
Circuits and Systems, 1999. 42nd Midwest Symposium on
Conference_Location :
Las Cruces, NM
Print_ISBN :
0-7803-5491-5
DOI :
10.1109/MWSCAS.1999.867201
