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Paper Abstract and Keywords
Presentation
A High-Resolution Capacitive-Sensor Interface Based on a Relaxation Oscillator
Motohiro Takayasu, Shiro Dosho, Hiroyuki Ito, Noboru Ishihara, Kazuya Masu (Tokyo Tech.)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a high-resolution capacitive-sensor interface based on relaxation oscillator. The interface whose outputs are period modulated has advantages that a conversion gain is high and effects of reference voltage noise can be cancelled topologically. In addition, observing long time period of output signals, SNR can be improved by averaging effects. The proposed interface has been fabricated by 180-nm CMOS process technology and evaluated with external capacitors. Oscillation-frequency of 476-kHz was observed with an internal reference-capacitor (4-pF), SNR was 110-dB with 10000-times averaging (measured time of 21-ms). The interface consumes 122-mW with 3.3-V power supply.
Keyword (in Japanese) (See Japanese page) 
(in English) capacitive-sensor interface / jitter / averaging effect / relaxation oscillator / / / /  
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Conference Information
Committee MW  
Conference Date 2017-06-14 - 2017-06-16 
Place (in Japanese) (See Japanese page) 
Place (in English) KMUTT, Bangkok, Thailand 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 2017 Thailand-Japan MicroWave (TJMW2017) 
Paper Information
Registration To MW 
Conference Code 2017-06-MW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A High-Resolution Capacitive-Sensor Interface Based on a Relaxation Oscillator 
Sub Title (in English)  
Keyword(1) capacitive-sensor interface  
Keyword(2) jitter  
Keyword(3) averaging effect  
Keyword(4) relaxation oscillator  
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1st Author's Name Motohiro Takayasu  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
2nd Author's Name Shiro Dosho  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
3rd Author's Name Hiroyuki Ito  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
4th Author's Name Noboru Ishihara  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
5th Author's Name Kazuya Masu  
5th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
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