| 摘要 |
PURPOSE:To eliminate the need for adjustment time for the adjustment of an output oscillating frequency at reproduction by providing a means storing a control voltage controlling an output oscillating frequency of a voltage controlled oscillator at recording and inpressing the controlled voltage stored at reproduction to the voltage controlled oscillator so as to control the output oscillating frequency. CONSTITUTION:A switch 35 is thrown to a terminal P at reproduction and a memory 37 is brought into the read state by a control signal read from a control circuit 38. The phase comparison error voltage stored in the memory 37 at recording is averaged at, e.g., the circuit 38 by using a read control signal from the control circuit 38 and read, the result is fed to the base of transistors Q1, Q2 via the terminal P of the switch 35 and the output oscillating frequency is changed. In this case, the VCO (voltage controlled oscillator) is disconnected from the PLL loop including the phase comparator 11 and since the output oscillating frequency is controlled by the phase comparison error voltage at recording stored in the memory 37, the output oscillation frequency is made the same as that at recording. |
