Designing Tuneable Circuits Using the DDCC2TA for Square, Triangular Wave Generation and Pulse Width Modulation

A new CMOS based block of Differential Difference Current Conveyor double Transconductance Amplifier (DDCC2TA) is proposed in this work. The DDCC2TA is used further to design tuneable circuits for square/triangular wave generator and pulse width modulator (PWM). It has been shown that a single active device (i.e., the DDCC2TA), along with a few passive components, is sufficient to generate all the waves simultaneously. The circuit has the merits like - high input impedance, high bandwidth, low power consumption, and tunability of oscillation frequency. The design's functionalities are validated using SPICE simulations on 0.25μm TSMC CMOS technology.