A low-power sensor interface circuit for remotely powered implants

Author

Xiao Liu ; Dehollain, Catherine

Author_Institution

Radio Freq. Integrated Circuit Group (RFIC), Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne, Switzerland

fYear

2013

fDate

24-27 June 2013

Firstpage

321

Lastpage

324

Abstract

This paper proposes an interface circuit for wirelessly powered implants for mice temperature monitoring. The circuit contains the read-out circuit and a data converter. By using a novel approach to cancel the non-linear effects of thermistor sensors, the circuit achieves 27dB higher SFDR. The system is designed in UMC CMOS 0.18μm technology, which has 200KHz sampling rate, 8-bit resolution, and total power-consumption of 29μW. The successive approximation analog-to-digital convertor (SAR ADC) is fabricated. The measurement result shows an Effective Number of Bits (ENOB) of 7.

Keywords

CMOS integrated circuits; analogue-digital conversion; power consumption; prosthetics; radiofrequency identification; readout electronics; temperature sensors; thermistors; 8-bit resolution; ENOB; SAR ADC; UMC CMOS technology; data converter; effective number of bits; frequency 200 kHz; low-power sensor interface circuit; mice temperature monitoring; nonlinear thermistor sensor effects; power 29 muW; power consumption; read-out circuit; remotely powered implants; size 0.18 mum; storage capacity 8 bit; successive approximation analog-to-digital convertor; wirelessly powered implants; Capacitors; Clocks; Monitoring; Power demand; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Ph.D. Research in Microelectronics and Electronics (PRIME), 2013 9th Conference on

Conference_Location

Villach

Print_ISBN

978-1-4673-4580-4

Type

conf

DOI

10.1109/PRIME.2013.6603173

Filename

6603173