Patent ID: 7999865

Claim:
An imaging array comprising a plurality of light pixels and a sense amplifier, each light pixel being connectable to said sense amplifier in response to a control signal coupled to that light pixel, wherein each light pixel comprises a photodetector that couples a signal indicative of a light exposure to a light pixel node; a readout circuit for outputting a signal related to potential on said light pixel node, and a light pixel mixer that mixes a signal on said light pixel node with a pixel oscillator signal having a first frequency, and wherein said sense amplifier comprises: a first input node that receives a signal from each light pixel, one light pixel at a time; a first high pass filter connected to said first input node and attenuating signals with frequencies less than a cutoff frequency; a first sense amplifier mixer coupled to an output of said first high pass filter, said first sense amplifier mixer mixing signals output by said first high pass filter with a second frequency to obtain a first mixed signal; and a low pass filter that blocks signals having frequencies greater than a cutoff frequency, an output of said low pass filter being related to said potential on said light pixel node of said light pixel connected to said first input node.