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A Design of Improved Current Subtracter and Its Application to Norton Amplifier  

Cha, Hyeong-Woo (Department of Electronics Engineering, Cheongju University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.48, no.12, 2011 , pp. 82-90 More about this Journal
Abstract
A novel class AB current subtracter(CS) and its application to Norton amplifier(NA) for low-power current-mode signal processing are designed. The CS is composed of a translinear cell, two current mirrors, and two common-emitter(CB) amplifiers. The principle of the current subtraction is that the difference of two input current applied translinear cell get from the current mirror, and then the current amplify through CB amplifier with ${\beta}$ times. The NA is consisted of the CS and wideband voltage buffer. The simulation results show that the CS has current input impedance of $20{\Omega}$, current gain of 50, and current input range of $i_{IN1}$ > $i_{IN2}{\geq}4I_B$. The NA has unit gain frequency of 312 MHz, transresistance of 130 dB, and power dissipation of 4mW at ${\pm}2.5V$ supply voltage.
Keywords
current mode circuit; current subtracter; Norton amplifier; translinear cell; transresistance amplifier;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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