A wideband current-mode amplifier implemented from OTAs and its applications

A new concept for a current-mode amplifier (i.e. having input and output signals which are currents) is introduced. The circuit uses two operational transconductance amplifiers. Its gain-magnitude, which is temperature independent, is adjustable from one of the control-currents of the OTAs. Various applications of the circuit are also suggested, among which are a decoder and current-mode multiplexer. SPICE simulation results using the nominal transistors parameters of the high performance bipolar array ALA200 from ATT are given and discussed.<
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