Patent ID: 7948410
Filing Date: 2011-05-24
Classification: H03M

Abstract:
1. An apparatus comprising: a sample switch that receives an input signal, wherein the sample switch is actuated by a sample signal; a sampling capacitor that is coupled to the sample switch; an amplifier having a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal of the amplifier is coupled to the sampling capacitor; a plurality of feedback branches coupled between the output terminal of the amplifier and the first input terminal of the amplifier, wherein each feedback branch includes: a second hold switch that is coupled to the sampling switch; a N-bit converter pair that is coupled to the sampling switch and to the second hold switch; a third hold switch that is coupled to at least one of the feedback branches; and an M-bit converter pair that is coupled to the output terminal of the amplifier and to the third hold switch.