Study and Performance Analysis of Two Stage High Speed Operational Amplifier Using Indirect Compensation
نویسندگان
چکیده
The performance analysis of the two-stage CMOS operational amplifiers employing Miller capacitor in conjunction with the common-gate current buffer is presented. Unlike the previously reported design strategy of the opamp of this type, which results in the opamp with a lower power supply requirements, better phase margin and better speed. The Opamp is designed to exhibit a unity gain frequency of 1.46GHz and exhibits a gain of 115dB with a 117 ̊ phase margin. As compared to the conventional approach, the indirect compensation method results in a higher unity gain frequency under the same load condition. Simulation has been carried out in LT-SPICE. KeywordsCurrent Buffer, Miller Compensation, Indirect Compensation, Phase Margin ,Unity Gain Frequency
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