Title :
Low power OTA-less I-V-converter with single-ended to differential conversion for capacitive sensor interfaces
Author :
Attarzadeh, Hourieh ; Ytterdal, Trond
Author_Institution :
Dept. of Electron. & Telecommun., NTNU, Trondheim, Norway
Abstract :
This paper presents a current-mode interface circuit for capacitive sensors, with the main feature of being able to produce a differential output voltage from a single-ended capacitive sensor. The circuit has been designed combining two concepts of Folded Current Mirror and Charge Sampling. A total harmonic distortion of 34db over a 5-MHz signal bandwidth, and a DR of 48db are estimated. The circuit consumes only 60uA from a 1.5V supply. The efficiency of the proposed scheme is evaluated in a 130nm CMOS technology from Global Foundries.
Keywords :
capacitive sensors; current mirrors; harmonic distortion; current 60 muA; frequency 5 MHz; voltage 1.5 V; wavelength 130 nm; Bandwidth; CMOS integrated circuits; Capacitive sensors; Linearity; Mirrors; Noise; Capacitive Sensing; Charge Sampling; Interface Circuit; Low Power Design;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2013 European Conference on
Conference_Location :
Dresden
DOI :
10.1109/ECCTD.2013.6662308
