556 / 2019-03-14 20:44:50

A Low Power Up/Down Double-Data-Rate Counter for CMOS Image Sensors

CMOS image sensor,single-slope ADC,counter,correlated double sampling

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A novel low power column level up/down double -data-rate (DDR) counter for CMOS image sensors is proposed. To reduce the power consumption, a lowest bit circuit recording the parity information of the signal is designed. The proposed counter is suitable for the digital correlated double sampling operation. A 11-bit counter is realized with a 65nm CMOS process and the total power consumption in 500MHz clock is only 5.68 μW which is 80.6% compared to a traditional up/down DDR counter.