This paper describes the conception of the current follower transconductance amplifier (CFTA) with electronically and linearly current tunable. The newly modified element is realized based on the use of transconductance cells (G m s) as core circuits. The advantage of this element is that the current transfer ratios (i z/i p and i x/i z) can be tuned electronically and linearly by adjusting external DC bias currents. The circuit is designed and analyzed in 0.35 μm TSMC CMOS technology. Simulation results for the circuit with ±1.25 V supply voltages show that it consumes only 0.43 mw quiescent power with 70 MHz bandwidth. As an application example, a current-mode KHN biquad filter is designed and simulated.
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机译：本文介绍了具有电流和电流线性可调功能的电流跟随器跨导放大器（CFTA）的概念。基于跨导单元（G m s）作为核心电路的使用来实现新修改的元件。该元件的优点在于，可以通过调节外部直流偏置电流以电子方式和线性方式调节电流传输比（i z / i p和i x / i z）。该电路采用0.35μm的TSMC CMOS技术进行设计和分析。电源电压为±1.25 V的电路的仿真结果表明，它在70 MHz带宽下仅消耗0.43 mw的静态功率。作为一个应用实例，设计并仿真了一种电流模式KHN双二阶滤波器。
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