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100 条记录 (耗时 0.013 秒)

    Generation of stepped voltages for color television and the like
    1.
    发明授权
    Generation of stepped voltages for color television and the like 失效
    生成彩色电视机的阶梯电压等

    公开(公告)号：US3887838A

    公开(公告)日：1975-06-03

    申请号：US80511369

    申请日：1969-03-04

    申请人： POLAROID CORP

    发明人： THURSTON RICHARD P

    IPC分类号： H03K3/35 ,  H03K3/352 ,  H04N9/27 ,  H01J29/80

    CPC分类号： H03K3/35 ,  H03K3/352 ,  H04N9/27

    摘要： This specification discloses a high voltage switching system for driving the screen of a color television picture tube in order to generate different color images on the screen thereof in accordance with different video signals. The switching system comprises a transformer, which is connected into a resonant circuit with the capacitance provided by the screen of the color television system. The inductance provided by the transformer is periodically switched between low and high inductance and simultaneously with the switching, energy is coupled into and out of the resonant circuit to generate a step waveform across the capacitance provided by the screen of the picture tube.

    摘要翻译： 本说明书公开了一种用于驱动彩色电视显像管的屏幕的高压开关系统，以便根据不同的视频信号在其屏幕上产生不同的彩色图像。 开关系统包括变压器，其连接到由彩色电视系统的屏幕提供的电容的谐振电路中。 由变压器提供的电感周期性地在低电感和高电感之间切换，并且与开关同时，能量被耦合到谐振电路中并从谐振电路输出，以在由显像管的屏幕提供的电容之间产生一个阶跃波形。

    Apparatus for obviating undesirable operation of an electric circuit due to faulty switching
    2.
    发明授权
    Apparatus for obviating undesirable operation of an electric circuit due to faulty switching 失效
    由于故障切换导致电路不能工作的装置

    公开(公告)号：US3794859A

    公开(公告)日：1974-02-26

    申请号：US3794859D

    申请日：1972-10-06

    申请人： TEXAS INSTRUMENTS INC

    发明人： FINNEGAN F

    IPC分类号： H03K3/35 ,  H03K17/73 ,  H03K5/08 ,  H03K17/00

    CPC分类号： H03K3/35 ,  H03K17/73

    摘要： The disclosure relates to a gating circuit which is normally operated by means of an external switching device which supplies the necessary power to the gating circuit. A PTC element is provided in parallel with the gating circuit whereby, in the event that the switch which supplies power to the gating circuit is leaky and presents a high resistance rather than an infinite resistance in its open state, the currents provided to the gating circuit under these conditions will be shunted around the gating circuit through the PTC elements. Under operation where the switch is closed, the PTC elements will rapidly change to high resistance elements and thereby effectively remove themselves from the circuit.

    摘要翻译： 本公开涉及一种门控电路，其通常由外部开关装置操作，外部开关装置向选通电路提供必要的电力。 提供与门控电路并联的PTC元件，由此在向门控电路供电的开关泄漏并且在其打开状态下呈现高电阻而不是无限电阻的情况下，提供给门电路的电流 在这些条件下，将通过PTC元件在门控电路周围分流。 在开关闭合的操作下，PTC元件将迅速变为高电阻元件，从而有效地将电路从电路中移除。

    Bistable circuit
    3.
    发明授权
    Bistable circuit 失效
    双电路

    公开(公告)号：US3564345A

    公开(公告)日：1971-02-16

    申请号：US3564345D

    申请日：1968-02-01

    申请人： WESTERN ELECTRIC CO

    发明人： BAYNARD JOSEPH S JR

    IPC分类号： H03K3/00 ,  H03K3/35 ,  H03K3/352 ,  H03K23/84 ,  H01H47/32

    CPC分类号： H03K3/352 ,  H03K3/00 ,  H03K3/35 ,  H03K23/84

    摘要： A bistable circuit in which a normally unactuated silicon controlled rectifier is serially connected with a fixed resistor and the coil of a relay. Depression of a control switch forward biases the gate of the rectifier to initiate conduction and the subsequent release of the control switch shorts out the series resistor to actuate the relay. Actuation of the relay connects the control switch across the rectifier and a subsequent depression of the switch stops conduction through the rectifier. Release of the control switch then deactuates the relay.

    Commutation systems incorporating the energy logic concept
    4.
    发明授权
    Commutation systems incorporating the energy logic concept 失效
    符合能源逻辑概念的通信系统

    公开(公告)号：US3555399A

    公开(公告)日：1971-01-12

    申请号：US3555399D

    申请日：1967-11-16

    申请人： GEN SYSTEMS INC

    发明人： BUCHANAN JAMES L ,  ZELINA WILLIAM B

    IPC分类号： H02M3/137 ,  H02M3/315 ,  H03K3/35 ,  H03K17/723 ,  H02M7/44

    CPC分类号： H02M3/3155 ,  H02M3/137 ,  H03K3/35 ,  H03K17/723

    摘要： A COMMUTATION SYSTEM FOR TURNING OFF AN ELECTRIC VALVE WHICH WHEN CONDUCTING SUPPLIES ENERGIZING CURRENT TO AN ELECTRICAL LOAD MEANS FROM A DIRECT CURRENT SOURCE WHEREIN AN ELECTRICAL ENERGY STORAGE MEANS IS CONNECTED TO BE CHARGED WHEN THE ELECTRIC VALVE IS NONCONDUCTING AND THE ENERGY THEREOF IS SENSED BY AN ENERGY SENSING MEANS CONNECTED TO PREVENT THE APPLICATION OF ELECTRICAL TURN ON SIGNALS TO THE ELECTRICAL VALVE UNLESS A PREDETERMINED AMOUNT OF ENERGY IS STORED IN SUCH ENERGY STORAGE MEANS. AT A DESIRED TIME AFTER THE INITIATION OF CONDUCTION IN THE ELECTRIC VALVE, AND PREFERABLY A FIXED TIME THEREAFTER, THE

    ENERGY OF THE ENERGY STORAGE MEANS IS UTILIZED TO REVERSE BIAS THE ELECTRIC VALVE.