Two Quadrant Analog Voltage Divider and Square-Root Circuits Using OTA and MOSFETs

In this communication, two novel architectures of voltage mode analog divider circuit and square-root circuit using an operational transconductance amplifier (OTA) have been presented. The proposed divider circuit employs an OTA and two MOSFETs, while the square-root circuit requires one OTA along with one MOSFET. The proposed divider circuit can also be configured as inverse voltage function generator. The performance of the proposed circuits has been validated through Cadence Virtuoso simulations using 0.18 mu m CMOS technology parameters. The total power consumption for analog divider circuit is 821 mu W, while for square-root circuit, it is 442 mu W with +/- 0.9 V power supply. Experimental results have also been provided to validate the theory.