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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 31-570
Full Name: Chia-Chun Tsai
Position: Professor
Age: ON
Sex: Female
Address: 32 Chung Keng Li, Dalin, Chiayi county, Taiwan 62248
Country: TAIWAN
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E-mail address: chun@mail.nhu.edu.tw
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Title of the Paper: The Circuit Design of Current-Mode Image Sensor Embedded Smooth Spatial Filter With Flash A/D Converter
Authors as they appear in the Paper: Chia-Chun Tsai, Huang-Chi Chou, and Trong-Yen Lee
Email addresses of all the authors: chun@mail.nhu.edu.tw , hcchou@vlsi.en.ntut.edu.tw , tylee@ntut.edu.tw
Number of paper pages: 10
Abstract: The paper presents a current-mode CMOS image sensor embedded smooth spatial filter algorithm with a flash analog-to-digital (A/D) converter. The sensor includes a 66¡Ñ66 pixel array with an on-chip 6-bit A/D converter that can identify the output value of pixels in gray level resolution. The last row of pixel cells (1¡Ñ66) based on the double sampling is used for reducing fixed pattern noise (FPN). Processing circuits are dedicated for the spatial filter algorithm and support reusability to increase the image processing speed and to reduce the design complexity and chip area. The sensor chip has been designed and implemented in TSMC 0.35ƒÝm 2P4M CMOS mixed-mode process. Experimental results show that each pixel occupies a area of 15.8ƒÝm¡Ñ10.6ƒÝm with a fill factor of 37.2%. The power consumption is 35.15mW when the sensor operates at 175 frames/second.
Keywords: Image senser, smooth spatial filter, Flash A/D converter, pixel cell, CMOS process.
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