title: Programmable Low-Power Low-Noise Capacitance to Voltage Converter for MEMS Accelerometers.
abstract: In this work, we present a capacitance-to-voltage converter (CVC) for capacitive accelerometers based on microelectromechanical systems (MEMS). Based on a fully-differential transimpedance amplifier (TIA), it features a 34-dB transimpedance gain control and over one decade programmable bandwidth, from 75 kHz to 1.2 MHz. The TIA is aimed for low-cost low-power capacitive sensor applications. It has been designed in a standard 0.18-μm CMOS technology and its power consumption is only 54 μW. At the maximum transimpedance configuration, the TIA shows an equivalent input noise of 42 fA/ Hz at 50 kHz, which corresponds to 100 μg/ Hz .
authors.affiliation: Group of Electronic Design-Aragón Institute of Engineering Research, Universidad de Zaragoza, 50009 Zaragoza, Spain. royo@unizar.es.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Royo
authors.affiliation: Group of Electronic Design-Aragón Institute of Engineering Research, Universidad de Zaragoza, 50009 Zaragoza, Spain. csanaz@unizar.es.
authors.forename: Carlos
authors.initials: C
authors.lastname: Sánchez-Azqueta
authors.affiliation: Institute of Information and Communication Technologies, Electronics and Applied Mathemathics, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium. cecilia.gimenogasca@uclouvain.be.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Gimeno
authors.affiliation: Group of Electronic Design-Aragón Institute of Engineering Research, Universidad de Zaragoza, 50009 Zaragoza, Spain. caldea@unizar.es.
authors.forename: Concepción
authors.initials: C
authors.lastname: Aldea
authors.affiliation: Group of Electronic Design-Aragón Institute of Engineering Research, Universidad de Zaragoza, 50009 Zaragoza, Spain. scelma@unizar.es.
authors.forename: Santiago
authors.initials: S
authors.lastname: Celma
keywords: accelerometer; capacitive sensing; microelectromechanical systems (MEMS); synchronous demodulation; transimpedance amplifier