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IMAGE SENSOR WITH SHARED GRAY CODE GENERATOR AND PARALLEL COLUMN ARITHMETIC LOGIC UNITS
IMAGE SENSOR WITH SHARED GRAY CODE GENERATOR AND PARALLEL COLUMN ARITHMETIC LOGIC UNITS
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机译:具有共享灰码生成器和并行列算术逻辑单元的图像传感器
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摘要
A readout circuit for use in an image sensor includes a plurality of comparators. Each one of the plurality of comparators is coupled to receive a ramp signal and a respective analog image data signal from a respective one of a plurality of column bit lines to generate a respective comparator output. Each one of a plurality of arithmetic logic units (ALUs) is coupled to receive phase-aligned Gray code (GC) outputs generated by a GC generator. Each one of the plurality of ALUs is further coupled to a respective one of the plurality of comparators to receive the respective comparator output. Each one of the plurality of ALUs is coupled to latch the phase-aligned GC outputs in response to the respective comparator output to generate a respective digital image data signal.
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