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New all digital-transistor CMOS very high DC-gain amplifiers that use internal positive-feedback technique are presented. These structures don't require perfect matching of transistors to achieve the very high DC gain, and have a very low gain sensitivity to output swing. An implementation of a sample and hold circuit constructed using one of the proposed(More)
Several new CMOS very high DC-gain amplifiers that use internal positive-feedback techniques are presented. These amplifiers have a controllable gain and don't require perfect matching of transistors to achieve the high DC gain. An implementation of a sample and hold circuit constructed using one of the proposed amplifiers is described. Sin~ulation results(More)
CMOS continuous-time and switched-capacitor filters which operate at high frequencies with high Quality factor Q are difficult to realize. The finite gain and the finite bandwidth of the integrator amplifiers are the main limitation. This paper describes two techniques to simultaneously increase bandwidth, transconductance, and DC-gain of an amplifier(More)
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