INFORMATION RECORDING DISK REPRODUCING DEVICE

摘要

PURPOSE:To mute surely pseudo tracking control signal even in case of one of horizontal synchronizing signals is left out by taking out a free-running oscillation signal synchronously with the horizontal synchronizing signals. CONSTITUTION:Horizontal synchronizing signals taken out from a separation circuit 10 operate a timer 11a of an oscillating circuit 11. The circuit 11 is synchronized by a trigger of the horizontal synchronizing signals making the term of several horizontal synchronizing signals a period, and free-running oscillates pulse of the same frequency.