CMOS sample-and-hold circuit using current conveyor analogue switch

Abstract

This paper presents a new CMOS sample-and-hold (S/H) circuit employing one second-generation current conveyor (CCII), one resistor and one capacitor. Unlike, conventional S/H circuits, the proposed S/H circuit is absent from MOS switches. The proposed S/H circuit uses CCII to work as analog switch (CCAS) which high speed on-off status of switch and without buffer circuit can be obtained. The status on-off of switch is controlled by bias current. This bias current is sampling pulse that used for sampling input signal. The proposed S/H circuit is suitable for low-power and high accuracy for signal processing applications. The simulation results are used to confirm the workability of the proposed circuit.