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Bipolar low-power operational transresistance amplifier based on first generation current conveyor

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3 Author(s)
H. Barthelemy ; Lab. L2MP, Provence Univ., Marseille, France ; I. Koudobine ; D. Van Landeghem

A new class AB bipolar transresistance topology suitable for low power applications is presented. The circuit uses a positive first generation current conveyor (CCI+) as floating input stage. Simulation results, using nominal parameters for the bipolar transistors arrays HFA3127 and HFA3128 from Intersil Semiconductor, are presented to demonstrate the amplifier performance. Simulated performances give an 85 dB low frequency open-loop gain for a total power consumption of 352 μW at 3 V supply voltage. To demonstrate the principle, the operational amplifier is used to implement inverting and noninverting amplifiers, for which the analysis, simulations, and experimental results are given on a prototype using bipolar transistor arrays

Published in:

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:48 ,  Issue: 6 )