DETECTION CIRCUIT AND METHOD TO MITIGATE 1/F NOISE IN SINGLE DETECTORS AND IN IMAGE SENSORS

A circuit includes an input capacitor that stores charge based on a current received from a photodetector during a bias phase of the photodetector. The stored charge on the input capacitor is sampled during the sampling phase to determine an amount of light captured by the photodetector. A bias controller supplies a pulsed-bias voltage to the photodetector to generate the current from the photodetector. The bias controller controls the current to a current level below a predetermined current threshold via the pulsed-bias voltage before biasing of the detector and subsequent sampling of the stored charge on the input capacitor is initiated to mitigate 1/F noise in the photodetector.