Mixed signal op-amp in 65nm technology

This paper presents a new methodology for design of high speed CMOS operational amplifier in Sub-micron region. The op-amp uses a compensation technique which increases the unity gain frequency and phase margin simultaneously. The CMOS op-amp presented in this paper works on 1.5V designed in 65nm standard CMOS technology. It exhibits 86dB DC gain. With load of 5pF, the unity gain frequency and phase margin are 34MHz and 84° respectively. The op-amp is fairly small and slew rate is more than other low power low voltage op-amps reported. This op-amp is then simulated for application in peak detector.