Low voltage EX-CCCII based on quasi-floating gate technique and its application as precision rectifier

Abstract

This paper introduces a novel low-voltage low-power Extra-X Current Controlled Current Conveyor (EX-CCCII) based on quasi floating gate (QFG) MOSFET. The QFG technique is employed in low voltage applications and overcomes the limitation of the floating gate technique. The presented circuit is implemented at a supply voltage of ±0.5 V with a power consumption of 90 µW at 20 µA bias current. As an application, the proposed QFG based EX-CCCII is employed to realize a novel current mode precision rectifier circuit. This circuit can simultaneously provide positive and negative type half wave and full wave rectifiers with the same circuit configuration. Furthermore, the rectifier circuit has low input and high output impedance terminals making it suitable for cascading with other current mode circuits. All the results provided to verify the circuit performance are simulated using CADENCE VIRTUOSO SPECTRE simulator with 0.18 µm UMC CMOS technology process parameters. The simulation results confirm the theoretical concept.