A computer-based programmable waveform generator

The programmable waveform generator, which is capable of producing complex voltage—time programs, is based on a PDP-$\text{11}\text{34}$ minicomputer with associated DIGITAL hardware. The desired waveform is obtained by clock-controlled output of a symmetrical triangular voltage sweep. The software can be readily adapted to any computer system. Ramp sections of 1 mV s^-1—50 V s^-1 and potential pulses of 50 μs—500 s can be obtained.