Tunable Resistor and Grounded Capacitor Based Square Wave Generator Using CMOS DCCII

The novel implementation of the square wave generator with the current mode device of the CMOS second generation differential current conveyor (DCCII) as an active element with the grounded resistor and grounded capacitor has been proposed in this paper. This circuit offers the advantage of electronic tunability of its duty cycle with externally connected resistor, and capacitor. The proposed circuit has been compared with the existing square wave generators and its advantages are tabulated. The gpdk 180 nm technology has been used for designing and simulation of the proposed circuit using Cadence virtuoso. And it is verified experimentally with the commercially available CFOA of AD844AN.