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Design of Two Stage OpAmp with Miller Compensation Series Resistance
  • Ashwith Kumar Reddy Penubadi ,
  • Dr. Srividya P
Ashwith Kumar Reddy Penubadi
Rashtreeya Vidyalaya College of Engineering

Corresponding Author:[email protected]

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Dr. Srividya P
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Abstract

In this paper, design of Two stage opamp has been introduced with Miller compensation for high gain and phase margin suitable for Sample Hold Amplifiers and ADC applications. Two-stage operational amplifiers provide a versatile and high-performance solution for numerous analog signal processing applications. By combining the benefits of a differential amplifier and a gain stage, two-stage op-amps offer improved gain, wider bandwidth, and increased output voltage swing compared to single-stage op-amps. Careful consideration of design parameters, compensation techniques, and performance characteristics enables the creation of efficient and stable two-stage op-amps that meet. The designed opamp has 77dB of gain and 72deg phase margin with a CMRR of 114dB and PSRR of -78.5dB compromising on 60% reduction in slew rate but the power dissipation is greatly reduced. Hence for stability purposes the series resistor Opamp can be used in Sample and Hold Amplifiers and ADC applications.