Simple CMOS square wave generator with variable mode output

Abstract

Copyright © 2020 by the Authors. A novel square-wave generator based on a single CCCII (current controlled conveyor), with only two external grounded passive components is proposed in this paper. The circuit provides precise, electronically controllable, voltage or current output square-wave signals. The simulation results using 0.18 mm CMOS parameters and experimental verification confirm the feasibility of the proposed circuit. The proposed generator can operate very well at up to 25 MHz with nonlinearity less than 5%.