Phase locked loop frequency synthesizer with DC data modulation
capability
    2.
    发明授权
    Phase locked loop frequency synthesizer with DC data modulation capability 失效
    具有DC数据调制能力的锁相环频率合成器

    公开(公告)号:US5130676A

    公开(公告)日:1992-07-14

    申请号:US760028

    申请日:1991-09-06

    申请人: Leslie D. Mutz

    发明人: Leslie D. Mutz

    IPC分类号: H03C3/00 H03C3/09 H04L27/12

    摘要: A phase locked loop frequency synthesizer with DC data modulation capability is described. This synthesizer includes an arrangement for detecting one of a plurality of FSK data levels (61), generating a corresponding predetermined compensation signal (71) and utilizing the compensation signal to substantially continuously compensate the frequency synthesizer for normal response to the detected data modulation level.

    摘要翻译: 描述了具有DC数据调制能力的锁相环频率合成器。 该合成器包括用于检测多个FSK数据电平(61)中的一个的装置,产生相应的预定补偿信号(71),并利用该补偿信号基本上连续地补偿频率合成器以对检测到的数据调制电平进行正常响应。

    Method and apparatus for digital modulation using concurrent pulse
addition and subtraction
    3.
    发明授权
    Method and apparatus for digital modulation using concurrent pulse addition and subtraction 失效
    使用并发脉冲加减法进行数字调制的方法和装置

    公开(公告)号:US5289141A

    公开(公告)日:1994-02-22

    申请号:US960150

    申请日:1992-10-13

    IPC分类号: H03C3/09 H03L7/06 H04L27/12

    CPC分类号: H03C3/0966

    摘要: A method and apparatus for generating an output signal (616) having a pre-determined frequency shift relative to the frequency of a reference signal from a reference frequency generator (202) comprise a digital phase-locked loop (206) coupled to the reference signal for generating the output signal (616). The method and apparatus further comprise adding pulses to the reference signal in a pulse addition circuit (304), the pulses recurring at a first cyclical rate determined by a microprocessor (702). The method and apparatus further comprise concurrently subtracting pulses from the reference signal in a pulse subtraction circuit (302) at a second cyclical rate.

    摘要翻译: 用于产生具有相对于参考频率发生器(202)的参考信号的频率的预定频移的输出信号(616)的方法和装置包括耦合到参考信号的数字锁相环(206) 用于产生输出信号(616)。 所述方法和装置还包括在脉冲相加电路(304)中将脉冲添加到参考信号,所述脉冲以由微处理器(702)确定的第一循环速率重复。 所述方法和装置还包括在脉冲减法电路(302)中以第二周期性速率从参考信号中同时减去脉冲。