Patent ID: 8982259
Filing Date: 2015-03-17
Classification: H03M,H04N

Abstract:
1. An image sensor comprising: a pixel array comprising a plurality of pixels arranged in a matrix of a plurality of rows and columns, each of the plurality of pixels being configured to convert intensity of incident light into an electrical image signal; and an extended counting analog-to-digital converter configured to: an integrator configured to integrate one of the output signal of the pixel array and a first reference signal; a comparison block configured to convert an output signal of the integrator into a digital signal based on at least one comparison signal; a digital-to-analog converter block configured to perform digital-to-analog conversion on an output signal of the comparison block; and an adder block configured to invert a sign of an output signal of the digital-to-analog converter block and output an inverted signal to an input terminal of the integrator.