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Paper Abstract and Keywords
Presentation 2018-11-28 16:30
[Poster Presentation] [Poster Presentation] A Current-Mode Differential Sensing CMOS Imager for Optical Linear Encoder
You-Shin Chen, Tzu-Hsiang Hsu (NTHU), Chien-Wen Chen (ITRI), Chih-Cheng Hsieh (NTHU)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a high speed low noise CMOS imager for optical linear encoder. Dual sensor arrays and the corresponding readout circuit are implemented for incremental and absolute signals, respectively. For incremental signal, current-mode differential sensing (CMDS) frontend with buffered direct injection (BDI) is proposed for DC background cancellation and high response bandwidth. Transimpedance amplifier (TIA) is implemented for current-to-voltage conversion with low-pass filtering function for noise reduction. Programmable amplifier (PGA) is implemented for single-to-differential conversion and full-range fitting for the following 12-bit SAR analog-to-digital converter (ADC). For absolute signal, 42 sensor pixels with the corresponding dual-threshold quantizer and latch are implemented. This work achieves a SNR of 63.4dB, a phase error of 33.8 degree at 3.3MHz incremental input, and an ADC ENOB of 11.08-bit at a sampling rate of 200kHz.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical encoder / transimpedance amplifier / position detection / / / / /  
Reference Info. ITE Tech. Rep., vol. 42, no. 40, IST2018-80, pp. 43-44, Nov. 2018.
Paper # IST2018-80 
Date of Issue 2018-11-21 (IST) 
ISSN Print edition: ISSN 1342-6893  Online edition: ISSN 2424-1970
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Conference Information
Committee IST  
Conference Date 2018-11-28 - 2018-11-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamachi Campus, TITECH 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 4th International Workshop on Image Sensors and Imaging Systems (IWISS2018) 
Paper Information
Registration To IST 
Conference Code 2018-11-IST 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) [Poster Presentation] A Current-Mode Differential Sensing CMOS Imager for Optical Linear Encoder 
Sub Title (in English)  
Keyword(1) Optical encoder  
Keyword(2) transimpedance amplifier  
Keyword(3) position detection  
1st Author's Name You-Shin Chen  
1st Author's Affiliation National Tsing Hua University (NTHU)
2nd Author's Name Tzu-Hsiang Hsu  
2nd Author's Affiliation National Tsing Hua University (NTHU)
3rd Author's Name Chien-Wen Chen  
3rd Author's Affiliation Industrial Technology Research Institute (ITRI)
4th Author's Name Chih-Cheng Hsieh  
4th Author's Affiliation National Tsing Hua University (NTHU)
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Date Time 2018-11-28 16:30:00 
Presentation Time 90 
Registration for IST 
Paper # ITE-IST2018-80 
Volume (vol) ITE-42 
Number (no) no.40 
Page pp.43-44 
#Pages ITE-2 
Date of Issue ITE-IST-2018-11-21 

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