PCM Recording and reproducing system

摘要

Phase signals are sensed from the frame synchronizing signals resulting from a PCM magnetic multitrack record tape and applied to a selector connected to a phase locked oscillator. The oscillator is connected to a gate signal generator. The selector responds to each gate signal from the gate generator to pass only one of the phase signals through the same. The oscillator has its phase synchronized with that of the phase signal passed through the selector and provides the phase signals serving to control the speed of the record tape.