Title :
Low voltage low power CMOS front-ends for capacitive sensors
Author_Institution :
Dipt. di Ingegneria Elettrica, l´´Aquila Univ., Italy
Abstract :
The application of a low voltage low power operational transconductance amplifier as a front-end for capacitive sensors is here described. Two traditional topologies, which use a capacitance-to-frequency conversion to automatically determine the capacitance variation, are proved to operate with supply voltages as low as 1.5 V
Keywords :
CMOS analogue integrated circuits; electric sensing devices; mixed analogue-digital integrated circuits; operational amplifiers; 1.5 V; CMOS front-ends; capacitance variation; capacitance-to-frequency conversion; capacitive sensors; low power CMOS; operational transconductance amplifier; supply voltages; Capacitive sensors; Circuit topology; Frequency; Intelligent sensors; Low voltage; Operational amplifiers; Oscillators; Parasitic capacitance; Phase shifters; Rail to rail amplifiers;
Conference_Titel :
Analog and Mixed IC Design, 1997. Proceedings., 1997 2nd IEEE-CAS Region 8 Workshop on
Conference_Location :
Baveno
Print_ISBN :
0-7803-4240-2
DOI :
10.1109/AMICD.1997.637191
