Patent ID: 8745115

Claim:
A pixel sensor converter for an image sensor array, the pixel sensor converter comprising: a pixel-level delta-sigma converter comprising a modulator and a decimator; wherein the modulator is configured to be in communication with a detector and is configured to sample an analogue signal received from a detector at a particular sampling rate, the modulator further configured to provide a bit stream of a particular bit rate, such a bit stream corresponding to a sampled analogue signal; and wherein the decimator is in communication with the modulator, and is configured to receive and modify a bit stream provided from the modulator in order to provide a digital output signal, such a digital output signal representative of an analogue signal received at the modulator, but having a reduced bit rate than a corresponding bit stream provided by the modulators; the decimator is configured to modify serially a received bit stream; and the decimator comprises an accumulator in order to modify a bit stream, the accumulator comprising a 1-bit register and a 1-bit adder configured to add together bits associated with a received bit stream.