CMOS-based near zero-offset multiple inputs max–min circuits and its applications
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CMOS-based near zero-offset multiple inputs maximum circuit and minimum circuits are proposed. The analog signal building blocks including shunt-feedback buffer, voltage-subtraction circuits and current mirrors are deployed for obtained the good performances. This achieved circuit is a simply scheme and able to work with low-power supplies. The input range is obtained around ±600 mV within ±1.5 V power supplies. Near zero-offset and low-output impedance are provided by proposed circuit. The delay of output is less than 5 ns for THD less than 1% and frequency response up to 500 MHz. Half-wave, full-wave rectifiers and 4 bits linear combination Digital-to-Analog Converter (DAC) are raised up to confirm the realistic applications. All performances including the DC-characteristic, frequency response, high-frequency wave output are simulated by PSpice.
KeywordsMaximum circuit Minimum circuit Rectifier DAC
The authors would like to thank our colleague Natapong Wongprommoon for his contribution to write this paper and anonymous reviewers who gave us comments and suggestions.
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