Voltage-controlled dual-slope square and triangular waveform generator

摘要

The voltage-controlled dual-slope square and triangular waveform generator is an electronic circuit that includes a plus-type second-generation current conveyor operably connected to a single operational amplifier. At the input stage to the operational amplifier, two metal-oxide semiconductor (MOS) transistors are configured as switches. Three resistors and a grounded capacitor are included in the electronic circuit, thereby maintaining a low component count. The leading and trailing slopes of the waveform are independently adjustable by selection of the voltages V₁ and V₂ that are selectively connectable to the y-input of the CCII+ via switching action of the MOS transistors. The frequency of the waveform is adjustable via the voltage divider ratio between the output and noninverting input of the operational amplifier. The simple and elegant nature of the circuit design provides a low-cost waveform generator that can be adjusted both for frequency and for independent leading edge and trailing edge slopes.