Patent ID: 8040270
Filing Date: 2011-10-18
Classification: H03M

Abstract:
1. A method for converting an analog signal to a digital signal, comprising: coupling at least a first capacitor and a second capacitor to an integrator in a feedback configuration; receiving an input pixel charge corresponding to the analog signal from at least one of a plurality of pixels of a detector array into the integrator and distributing the input pixel charge to the first capacitor and the second capacitor such that a first integrator output varies in proportion to the input pixel charge; providing the first integrator output to a double sampling amplifier for varying a first output of the double sampling amplifier in proportion to the input pixel charge; decoupling the input pixel charge from the integrator; converting one of the first integrator output and the first double sampling amplifier output to a first digital value; changing the coupling of the second capacitor from a feedback configuration to an integrator-input configuration and transferring charge of the second capacitor to the first capacitor such that a second integrator output varies in proportion to the transferred charge; providing the second integrator output to the double sampling amplifier for varying a second output of the double sampling amplifier in proportion to the transferred charge; converting one of the second integrator output and the second double sampling amplifier output to a second digital value.