| 摘要 |
PURPOSE:To sharply reduce the energy consumption of the whole synthesizer and to lower the operating cost of a device by intermittently operating a voltage control generator and a frequence-divider in which the energy consumption is large and, further, interrupting the power source of the frequency-divider after a phase synchronizing loop leads in. CONSTITUTION:A switch 74 is operated by an output pulse S4 of a control signal generating circuit 6, a voltage control generator 4 is activated, and a generating signal is outputted only for a fixed waiting time To in an assigning time T of a station designation. An output pulse 52 of the control signal generat ing circuit 6 operates a switch 73 after a time passes by a time t1 from the rise of the pulse S4, activates a frequency-divider 5, output a frequency-dividing output fP for a fixed time T1, and stopped thereafter. An output pulse S12 of the control signal generating circuit 6 is outputted for a fixed time T2 after the time passes by a time t2 from the rise of the pulse S3, operates switches 71 and 72, and prepares the phase locked loop. The voltage control generator 4 after the phase locked loop is released is controlled with a voltage V by a charge accumulated in the condenser of a loop filter 3, and outputs the signal of a prescribed generating frequency fOUT, throughout the waiting time T0. |
