Patent ID: 7969334

Claim:
An apparatus comprising: a sampling capacitor that receives an input signal; a multiplying digital-to-analog converter (MDAC) amplifier having an input terminal and an output terminal, wherein the sampling capacitor is coupled to the input terminal of the MDAC amplifier; a feedback capacitor that is coupled between the input terminal of MDAC amplifier and the output terminal of the MDAC amplifier; a correction amplifier having: an attenuating amplifier having an input terminal and an output terminal, wherein the input terminal of the attenuating amplifier is coupled to the output terminal of the MDAC amplifier; and a settling amplifier having an input terminal and an output terminal, wherein the input terminal of the setting amplifier is coupled to the output terminal of the attenuating amplifier so as to at least apply a settling gain to an output signal from the MDAC amplifier; and a correction capacitor that is coupled between the output terminal of the correction amplifier and the input terminal of the MDAC amplifier, wherein the capacitance of the correction amplifier is a fraction of the capacitance of the feedback capacitor.