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An ultra low-power class-AB four-quadrant current multiplier designed to be used in an energy-based action potential detector is presented. The multiplier is considered the first topology that provides fully class-AB operation. The topology is constituted by a class-AB current amplifier and a current splitter which can handle input signals in excess of ten times the bias current. The proposed circuit...
A class-AB four-quadrant current multiplier constituted by a class-AB current amplifier and a current splitter which can handle input signals in excess of ten times the bias current is presented. The proposed circuit operation is based on the exponential characteristic of BJTs or subthreshold MOSFETs. The multiplier is designed using the latter devices and achieves very low power consumption. Simulation...
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