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

fYear

2007

fDate

2-5 July 2007

Firstpage

113

Lastpage

116

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/RME.2007.4401824

Filename

4401824