Voltage-controlled dual slope operation square/triangular wave generator and its application as a dual mode operation pulse width modulator employing differential voltage current conveyors

This study presents a DVCC-based voltage-controlled dual slope operation square/triangular wave generator. The proposed configuration uses two differential voltage current conveyors (DVCCs) as active building blocks with four grounded passive components. The duty cycle of the proposed square/triangular wave generator can be adjusted by an input voltage source. The circuit also exhibits an independent control of its oscillation frequency free from the signal amplitude using a grounded resistor. This study also suggests a potentiometer-tuning scheme and a dual mode operation pulse width modulator (PWM) to extend the application of the proposed circuit. This study describes the circuit operations and discusses the non-ideal characteristics and design procedures of the proposed circuits. Prototype circuits were built using commercial ICs and discrete components. Is-Spice simulation and experimental results confirm the validity of the proposed circuits.

DVCC-based voltage-controlled dual slope operation square/triangular wave generator.Figure optionsDownload as PowerPoint slideHighlights
► This study presents a DVCC-based voltage-controlled dual slope operation square/triangular wave generator.
► The duty cycle of the proposed square/triangular wave generator can be adjusted by an input voltage source.
► This paper also suggests a potentiometer-tuning scheme and a dual mode operation pulse width modulator (PWM).