A Hybrid CMOS-Memristor based Programmable Wien Bridge Oscillator

This paper presents a novel programmable Wien Bridge Oscillator (WBO) using hybrid CMOS-Memristor circuit to generate required frequency based on memristor programmability. The memristor consumes very small area at nanoscale level and it offers the programmability of its resistance, the memristance. For these reasons, memristors are being extensively used in several electronic circuits for e.g., oscillators. This kind of programmability feature offered by the memristors enables their utilization in programmable circuits controlled by digital pulses. The programmable memristors used in the proposed WBO at the non-inverting side provide variation of frequency at various values of memresistance whereas programmable memristors at the inverting end vary the gain of the oscillator. The frequency variation achieved is 50 kHz to 6 kHz by varying the memristors from 10 kΩ to 80 kΩ, which is in close agreement to the theoretical frequency with an error of less than ±1%. The circuit simulations are performed using 180 nm CMOS technology.