Patent ID: 9137470
Filing Date: 2015-09-15
Classification: H04N

Abstract:
1. A readout integrated circuit (ROIC), comprising: an amplifier circuit configured to amplify a charge generated at a set of photo diodes and to convert a received signal associated with the set of photo diodes to a set of voltage signals based on a reference voltage (VREF); a filter circuit coupled to the amplifier circuit, the filter being configured to reduce frequency noise from the set of voltage signals; a first sampling circuit coupled to the filter circuit, the first sampling circuit being configured to sample the set of voltage signals before and after sampling a set of incoming image signals and to output a set of sampling results; a second sampling circuit coupled to the first sampling circuit, the second sampling circuit being configured to store the set of sampling results as received from the first sampling circuit; a first set of logic comprising a first amplifier coupled to a first capacitor and a first switch; and a second set of logic comprising a second amplifier coupled to a second capacitor and a second switch, the first set of logic and the second set of logic both being configured to receive a set of sampling results from the first sampling circuit.