A Single Stage Low Gain Pseudo Differential Class- AB telescopic Cascoded Op-amp for Pipelined ADC

In this paper, a low gain pseudo differential class-AB telescopic op-amp for pipelined ADC is presented. By applying split capacitor CDS technique in a pipelined ADC, finite op-amp gain errors of low gain op-amps are eliminated. This significantly reduces the power consumption of the pipelined ADC. A pseudo differential class AB op-amp is chosen as the suitable op-amp topology because of its high power efficiency and large signal swing compared to other topologies. Additional class AB capacitors used further enhances the DC gain and bandwidth of the amplifier.