By Marián Štofka, Slovak University of Technology, Bratislava, Slovakia
In electronics, there’s often a need for a two-output generator with alternating voltage pulses that don’t overlap. One simple generator that delivers on these requirements is shown in Figure 1 (please download PDF see link below).
The circuit is built using a single IC – the SN74HC14 by Texas Instruments – comprising six Schmitt-trigger-input inverters. Inverter I1 with resistor RG and capacitor CG form a generator of a rectangular waveform with a duty factor of around 0.5. Inverters I2 and I3 are fed by I1’s output through derivative circuits. The required pulse waveforms are outputted at channels A and B.