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Comparative study of two operational amplifier topologies for Pipelined Analog-to-Digital Converter ( ADC )

Designing a high performance analog circuits is becoming increasingly challenging task with the persistent trend toward reduced supply voltages. This paper describes a comparative study of two operational amplifier (op-amp) topologies for pipelined Analog-to-Digital Converter (ADC). By introducing of ADC architecture, this paper discussed a comparison between two differential op-amp design topologies which are telescopic and folded cascode. The comparison is based on DC gain, unity bandwidth, speed and also power consumption. The analysis of op-amp topologies are using 0.13μm Silterra process technology in Cadance software. The proper topology will be applied in pipelined ADC for this research work.