전자식 셔터와 A/D 변환기가 내장된 CMOS 능동 픽셀 센서
A CMOS Active pixel sensor with embedded electronic shutter and A/D converter
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Abstract
A CMOS active pixel sensor has been designed and fabricated using standard 2-poly and 4-metal 0.35m CMOS processing technology. The CMOS active pixel sensor has been made up of a unit pixel having a highly sensitive PMOSFET photo-detector and electronic shutters that can control the light exposure time to the PMOSFET photo-detector, correlated-double sampling (CDS) circuits, and an 8-bit two-step flash analog to digital converter (ADC) for digital output. This sensor can obtain a stable photo signal in a wide range of light intensity. It can be realized with a special function of an electronic shutter which controls the light exposure-time in the pixel. Moreover, this sensor had obtained the digital output using an embedded ADC for the system integration. The designed and fabricated image sensor has been implemented as a 128128 pixel array. The area of the unit pixel is 7.60m7.85m and its fill factor is about 35%.
참고문헌 (10)
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