Low-power low-voltage differential class-AB OTAs for SC circuits |
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Authors: | Carvajal RG Galan J Ramirez-Angulo J Torralba A |
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Affiliation: | Departamento de Ingenieria Electronica Escuela Superior de Ingenieros, Seville Univ., Spain; |
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Abstract: | Two new differential class-AB operational transconductance amplifiers (OTAs) for SC circuits that operate with a supply voltage of less than two transistor threshold voltages are introduced. They make use of a new class-AB pseudodifferential pair to generate signal currents much larger than quiescent currents. Both OTAs have been designed to operate with a supply voltage of V/sub DD/=1.1 V, using a 0.35 /spl mu/m CMOS technology. Simulation results for a load capacitance (C/sub L/) of 1 pF show 15 MHz gain-bandwidth product with a quiescent power consumption of 10 /spl mu/W. |
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