An electronic pulse corrector for D-C dialing circuits

The most widely used type of telephone switching equipment requires, for optimum operation, control pulses with a ratio of 60% break, 40% make. Distortion produced in interoffice transmission facilities may, however, result in wide variations in incoming pulse ratios. This paper describes a pulse corrector that produces uniform pulses of the proper ratio, from input pulses ranging from 10% to 90% break, at speeds of 7 1/2 to 14 pulses per second (pps).