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    • 23. 发明授权
    • Phase-locked loop with memory storing control data controlling the
oscillation frequency
    • 存储器的锁相环存储控制振荡频率的控制数据
    • US5355098A
    • 1994-10-11
    • US50608
    • 1993-04-22
    • Keiichi Iwasaki
    • Keiichi Iwasaki
    • H03L1/02H03L3/00H03L7/10H03L7/189H03L7/18
    • H03L3/00H03L1/026H03L7/10H03L7/189
    • A phase-locked loop with memory storing control data. The control data to be given to a voltage-controlled oscillator in a phase-locked loop is addressed in accordance with an oscillation condition including the frequency of a reference signal, a dividing ratio of the frequency divider and ambient air temperature. When the phase-locked loop is controlled off, the control voltage for the voltage-controlled oscillator is changed into digital data by an analog-to-digital converter to be transferred to the memory. The digital data or control data is read out from the memory when the phase-locked loop is controlled on. The control data is then changed into analog equivalent as control voltage supplied to the voltage-controlled oscillator, shortening the locking-up time.
    • 一个带有存储器控制数据的锁相环。 根据包括参考信号的频率,分频器的分频比和环境空气温度的振荡条件来解决给予锁相环中的压控振荡器的控制数据。 当锁相环被控制为关闭时,压控振荡器的控制电压通过模拟 - 数字转换器转换为数字数据,以传输到存储器。 当锁相环被控制时,数字数据或控制数据从存储器读出。 然后将控制数据改变为模拟等效值,作为提供给压控振荡器的控制电压,缩短锁定时间。