Electronic digital ratio equipment

The equipment provides an accurate method of multiplying a frequency by M/N, where M and N are integers and M ¿ N. Two batching counters are used to determine the output frequency in the long term and the equipment described restores the correct phase relationship. The equipment is transistorized and makes use of modern techniques for counting, gating and parallel addition and subtraction. A brief description is also given of a relay-operated decimal-to-binary converter which has been designed for the ratio equipment.