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Design And Analyse Of 0.5um CMOS Current-Feedback Op-Amps

Yang Xianfeng

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Abstract

This paper presents a new CMOS current-feedback operational amplifier based on the adoption of the resistance connecting across in order to improve drive capability,By using cascode circuit to improve the gain and the stablity.simulation results of the CFOA using BSM3's 0.5um CMOS process parameters with PSPICE,result in a high slew-rate as well as bandwidth gain-indepen-dence.Circuit parameters show a:84.2db open loop gain,447MHz unity gain bandwidth,62degree phase margin,138db CMRR and power consumption around 0.7mW from 1V supply voltage.

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What this paper is about

This paper presents a new CMOS current-feedback operational amplifier based on the adoption of the resistance connecting across in order to improve drive capability,By using cascode circuit to improve the gain and the stablity.simulation results of the CFOA using BSM3's 0.5um CMOS process parameters with PSPICE,result in a high slew-rate as well as bandwidth gain-indepen-dence.Circuit parameters show a:84.2db open loop gain,447MHz unity gain bandwidth,62degree phase margin,138db CMRR and power consumption around 0.7mW from 1V supply voltage.

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Available abstract

This paper presents a new CMOS current-feedback operational amplifier based on the adoption of the resistance connecting across in order to improve drive capability,By using cascode circuit to improve the gain and the stablity.simulation results of the CFOA using BSM3's 0.5um CMOS process parameters with PSPICE,result in a high slew-rate as well as bandwidth gain-indepen-dence.Circuit parameters show a:84.2db open loop gain,447MHz unity gain bandwidth,62degree phase margin,138db CMRR and power consumption around 0.7mW from 1V supply voltage.

Key concepts: Cascode, Open-loop gain, Slew rate, Phase margin, Computer science, CMOS, Gain–bandwidth product, Operational amplifier

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