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    Pulse width modulator for amplitude modulation circuit
    54.
    发明授权
    Pulse width modulator for amplitude modulation circuit 失效
    用于幅度调制电路的脉宽调制器

    公开(公告)号：US4272737A

    公开(公告)日：1981-06-09

    申请号：US42289

    申请日：1979-05-25

    申请人： Robert B. Molyneux-Berry

    发明人： Robert B. Molyneux-Berry

    IPC分类号： H03C1/16 ,  H03C1/00 ,  H03K7/08

    CPC分类号： H03C1/16

    摘要： A pulse width modulation circuit which uses a tube, such as a tetrode tube as the switching element, is arranged to minimise excessive power dissipation in the screen electrode circuit of the tube. The screen electrode is driven from a constant current source to prevent excessive current being diverted from the cathode to the screen electrode which would otherwise occur when the impedance of the anode circuit rises to a high value.

    摘要翻译： 布置使用诸如四极管等的管作为开关元件的脉宽调制电路，以使管的屏幕电极电路中的过多的功率消耗最小化。 屏幕电极由恒定电流源驱动，以防止当阳极电路的阻抗上升到高值时会出现过多的电流从阴极转移到屏幕电极。