Pulse generator for automatic dialling installation - marks selection criteria in using multiple-digit counter and marking circuits

摘要

The pulse generator has a multiple-digit electronic counter with fast clock control. Circuits are located in the outputs of the counter that determine the length of the pulses and spaces between pulses. The circuits take effect when the respective output is reached and initiate the resetting of the counter in the path and mark pulses or spaces. The circuit that marks the lower clock number is designed so that it only comes into operation if the circuit that marks the high clock number has previously come into operation.