Abstract
In this paper, a high linear, low-voltage two-quadrant current squarer as multifunction analog cell, is presented. To implement the squarer circuit, translinear loops with matched NMOS transistors operating in weak inversion region are used. The proposed cell is used as a basic building block for current-mode computational analog functions such as rectifier (absolute-value), multi-input vector summation and exponential function generator. We perform post-layout plus Monte Carlo simulations of the presented functions with 0.18 μm (level-49 parameters) TSMC CMOS technology that prove their superiority over some other advanced works and robustness against PVT (process, voltage and temperature) variations.
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