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21 条记录 (耗时 0.028 秒)

    Phase lock speed-up circuit
    14.
    发明授权
    Phase lock speed-up circuit 失效
    锁相加速电路

    公开(公告)号：US4115745A

    公开(公告)日：1978-09-19

    申请号：US839330

    申请日：1977-10-04

    申请人： William F. Egan

    发明人： William F. Egan

    IPC分类号： H03L7/091 ,  H03L7/095 ,  H03L7/10 ,  H03L7/187 ,  H03L7/199 ,  H03B3/04

    CPC分类号： H03L7/10 ,  H03L7/187 ,  H03L7/199 ,  H03L2207/18 ,  H03L7/091 ,  H03L7/095 ,  Y10S331/02

    摘要： This invention concerns a circuit which decreases the time required for certain phase-locked loops to pull in, that is, the time for the frequency of the oscillator which the loop controls to go from some initial error to some specified smaller error. The circuit is utilized with a loop employing an integrating element in the loop filter in conjunction with a logic circuit for indicating out-of-lock condition plus the sign of the frequency error and utilizes a source of direct current (DC) which is connected to the loop filter so as to increase the rate of change of the correction signal to the controlled oscillator and thereby speed-up tuning of the oscillator to the desired frequency.

    摘要翻译： 本发明涉及减少某些锁相环拉入所需时间的电路，即循环控制的振荡器的频率从一些初始误差转变为某个指定的较小误差的时间。 该电路与环路滤波器中的积分元件结合逻辑电路一起使用，用于指示失锁状态加上频率误差的符号，并使用直流电源（DC）源，其连接到 环路滤波器，以便将校正信号的变化率提高到受控振荡器，从而将振荡器的调谐加速到期望的频率。

    Composite weather barrier
    16.
    发明授权
    Composite weather barrier 有权
    复合天气屏障

    公开(公告)号：US06131353A

    公开(公告)日：2000-10-17

    申请号：US317573

    申请日：1999-05-24

    申请人： William F. Egan

    发明人： William F. Egan

    IPC分类号： B32B5/02 ,  E04B1/66 ,  E04D12/00 ,  E04D1/08

    CPC分类号： E04D12/002 ,  B32B5/02 ,  E04B1/66 ,  Y10S52/16

    摘要： A composite drainage mat for preventing water and moisture from remaining trapped within walls and roofs of buildings which includes a weather barrier fixedly attached to a three-dimensional matrix filamentatious mat of a thermoplastic polyamide resin such as Nylon 6. The mat contains a great number of voids for permitting gas and liquid such as water to flow therethrough. The mat possesses a crush-resistance which allows the mat to withstand the compressive force of other building materials without inhibiting the ability of the mat to allow liquids and gases to flow therethrough.

    摘要翻译： 一种复合排水垫，用于防止水和水分残留在建筑物的墙壁和屋顶内，该建筑物包括固定连接到诸如尼龙6的热塑性聚酰胺树脂的三维基质长丝毡的天气屏障。该垫包含大量 允许气体和液体如水流过的空隙。 垫子具有抗压缩性，其允许垫子承受其它建筑材料的压缩力，而不会阻碍垫子使液体和气体流过其的能力。

    Phase lock loop circuit
    17.
    发明授权
    Phase lock loop circuit 失效
    相位锁定环路

    公开(公告)号：US4001713A

    公开(公告)日：1977-01-04

    申请号：US649421

    申请日：1976-01-15

    申请人： William F. Egan

    发明人： William F. Egan

    IPC分类号： H03L7/091 ,  H03L7/10 ,  H03L7/199 ,  H03B3/04

    CPC分类号： H03L7/199 ,  H03L7/10 ,  H03L2207/18 ,  H03L7/091

    摘要： A phase locked loop circuit for a controlled oscillator employs a digital phase detector and maintains phase lock between trains of reference (R) pulses and controlled (C) pulses derived from the oscillator. Acquisition of a state of phase lock is aided by delaying or advancing the C-pulse relative to the next occurring R-pulse when the frequency of the C-pulses is higher or lower, respectively, than the R-pulse frequency. A frequency divider connected to the oscillator output is reset once during each cycle to produce C-pulses as an input to the phase detector and the R-pulse input to the phase detector is applied from a reference pulse source through a delay circuit. Logic elements responsive to the two phase detector inputs determine the relative frequencies of the latter and control operation of the frequency divider to either delay or advance the production of the C-pulse relative to the R-pulse without interrupting operation of the R-pulse source.