Title :
A micro power capacitive sensor readout channel based on the chopper modulation technique
Author :
Dei, M. ; Marchetti, E. ; Bruschi, P.
Author_Institution :
Univ. di Pisa, Pisa
Abstract :
A low power capacitance to voltage converter, specifically designed for integrated sensors, is presented. The circuit is based on a fully differential impedance meter driven by a triangular wave form. Synchronous demodulation allows effective reduction of low frequency noise and device mismatch effects. The results of simulations performed on a prototype, designed using the BCD6s process of STMicroelectronics, are presented.
Keywords :
capacitive sensors; choppers (circuits); demodulation; integrated circuit design; low-power electronics; microsensors; BCD6s process; STMicroelectronics; Synchronous demodulation; chopper modulation technique; device mismatch effects; fully differential impedance meter; integrated sensors; low frequency noise; low power capacitance-to-voltage converter; micro power capacitive sensor readout channel; triangular wave form; Capacitive sensors; Choppers; Chromium; Circuits; Energy consumption; Impedance; Operational amplifiers; Parasitic capacitance; Temperature sensors; Voltage;
Conference_Titel :
Research in Microelectronics and Electronics Conference, 2007. PRIME 2007. Ph.D.
Conference_Location :
Bordeaux
Print_ISBN :
978-1-4244-1000-2
Electronic_ISBN :
978-1-4244-1001-9
DOI :
10.1109/RME.2007.4401824
