Write current control circuit for audio recording

摘要

A write control circuit for audio signals in a video tape recorder having an audio signal processor for signal processing in order to record a received audio signal and a video signal processor for signal processing in order to record a received video signal includes a mode setting device for setting an exclusive audio recording mode, under the control of a user, and a bias control circuit for adjusting an audio recording signal output from the audio signal processor to be at it's optimum level when recording according to the characteristic of a recording head in the exclusive audio recording mode. The write control circuit improves the signal-to-noise ratio during the exclusive audio recording mode of operation by muting and recording an applied video signal while using the optimum bias current for a recording head.