Patent ID: 8436760

Claim:
An analog to digital converter (ADC) device comprising: sample and hold circuitry comprising a feedback capacitor and an operational amplifier; at least one ADC module configured to generate a first digital output based on a first analog input provided to the sample and hold circuitry; and current generation circuitry configured to modulate an analog output of the sample and hold circuitry to generate a residue output corresponding to the first analog input absent at least a portion corresponding to the first digital output, and to provide the residue output as a second analog input to further circuitry to generate a second digital output; wherein an output line of the operational amplifier is coupled with the current generation circuitry, a first side of the feedback capacitor is coupled with an output line of the current generation circuitry, a second side of the feedback capacitor is coupled with an input line of the operational amplifier, and the feedback capacitor is configured and arranged to receive the first analog input directly.