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    • 3. 发明授权
    • Universal frequency synthesizer
    • 通用频率合成器
    • US4321555A
    • 1982-03-23
    • US140762
    • 1980-04-16
    • Max E. HowkGale E. SlentzRonald E. Grillot
    • Max E. HowkGale E. SlentzRonald E. Grillot
    • H03L7/193H03L7/00
    • H03L7/193
    • This invention relates in general to a universal frequency synthesizer which is suitable for use in a phase-locked loop frequency synthesizer system comprising a voltage controlled oscillator, a reference oscillator and a low pass filter. The universal frequency synthesizer of the present invention is basically comprised of programmable divider circuitry and a phase detector.The universal frequency synthesizer is arranged to receive tuning data in serial format from an external source. The received tuning data is permanently stored within the universal frequency synthesizer and is used to establish the division ratio by which the output signal produced by the synthesizer's attendant voltage controlled oscillator and the reference signal produced by the synthesizer's attendant reference oscillator are divided before being provided to the signal and comparison inputs of the phase detector, respectively. In this way, the frequency of the output signal from the synthesizer's attendant voltage controlled oscillator may be changed by simply changing the tuning data stored with the device.
    • 本发明一般涉及适用于包括压控振荡器,参考振荡器和低通滤波器的锁相环频率合成器系统中的通用频率合成器。 本发明的通用频率合成器基本上由可编程分频器电路和相位检测器组成。 通用频率合成器被布置成从外部源接收串行格式的调谐数据。 所接收的调谐数据被永久地存储在通用频率合成器内,用于建立分频比,通过该分频比由合成器的伴随压控振荡器产生的输出信号和由合成器的伴随参考振荡器产生的参考信号在被提供给 相位检测器的信号和比较输入。 以这种方式,可以通过简单地改变存储在设备中的调谐数据来改变来自合成器的伴随压控振荡器的输出信号的频率。