公开(公告)号：US5089947A

公开(公告)日：1992-02-18

申请号：US546209

申请日：1990-06-29

申请人： Carleton D. Driscoll ,  Ronald S. Jungling ,  Elie M. Najm

发明人： Carleton D. Driscoll ,  Ronald S. Jungling ,  Elie M. Najm

IPC分类号： G09G1/00 ,  G09G1/04 ,  G09G1/16 ,  H02M3/28 ,  H02M3/335 ,  H04N5/63

CPC分类号： H02M3/33507

摘要： A full reset flyback regulator includes a power transformer having a primary winding and at least one secondary winding coupled to a load. A single control winding on a primary side of the power transformer is coupled through control circuitry to a gate electrode of a switching device that is connected to the primary winding. The voltage polarity on the control winding alternates so that if the switching device is "ON" a drive voltage is provided on its gate electrode and if the switching device is "OFF" a bias voltage is provided to the error amplifier control circuit. Each cycle of the regulator is initiated via a sync pulse which is provided from the high voltage flyback transformer of a display or monitor subsystem.

公开(公告)号：US5739597A

公开(公告)日：1998-04-14

申请号：US661273

申请日：1996-06-10

申请人： Warren D. Bailey ,  Elie M. Najm ,  Robin C. Wells

发明人： Warren D. Bailey ,  Elie M. Najm ,  Robin C. Wells

IPC分类号： G06F1/26 ,  H04L12/10 ,  H04L12/12 ,  H04L12/40

CPC分类号： G06F1/26 ,  H04L12/10 ,  H04L12/12 ,  Y10T307/625 ,  Y10T307/696 ,  Y10T307/724 ,  Y10T307/729 ,  Y10T307/944

摘要： A communications adapter card includes a circuit arrangement for causing an electrical voltage to be supplied to the card from a first voltage source, even if a second voltage source is available, and from the second voltage source if the first voltage source is not available. The circuit arrangement includes a Field Effect Transistor (FET) with its gate electrode connected to a control circuit which puts the FET in an off-state to inhibit the second voltage source from supplying voltage to the card if the first voltage source is available, and puts the FET in an on-state to supply voltage to the card if the first voltage source is not available. The invention makes it possible for a single communications adapter card to be used to attache power managed and non-power managed personal computers (PCs) to a Local Area Network (LAN).

摘要翻译： 通信适配器卡包括电路装置，用于使电源从第一电压源提供给卡，即使第二电压源可用，以及如果第一电压源不可用则从第二电压源提供电压。 电路装置包括场效应晶体管（FET），其栅电极连接到控制电路，其将FET置于截止状态，以阻止第二电压源向第一电压源提供电压;以及 如果第一个电压源不可用，将FET置于导通状态以向卡提供电压。 本发明使得可以使用单个通信适配器卡来将功率管理和非功率管理的个人计算机（PC）附加到局域网（LAN）。

公开(公告)号：US4888545A

公开(公告)日：1989-12-19

申请号：US201003

申请日：1988-06-01

申请人： Nicholas Celenza ,  Elie M. Najm

发明人： Nicholas Celenza ,  Elie M. Najm

IPC分类号： H02M7/08 ,  G05F1/00 ,  G05F1/20 ,  G05F1/563 ,  H02M7/12 ,  H02M7/23

CPC分类号： G05F1/20 ,  G05F1/563

摘要： Described is a novel power supply for generating a constant d.c. voltage from a variable a.c. voltage supply line. The power supply includes a plurality of switch circuits which monitor voltage levels on respective secondary windings of a power transformer and as voltage levels change, one of the plurality of switch circuits is selected to charge a capacitor which provides a range of d.c. voltages which are processed to provide the constant d.c. voltage.

公开(公告)号：US4685020A

公开(公告)日：1987-08-04

申请号：US730897

申请日：1985-05-06

申请人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

发明人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

IPC分类号： H02H7/12 ,  H02M3/335 ,  H02H3/20

CPC分类号： H02H7/1213 ,  H02M3/33561

摘要： A protective circuit arrangement is provided for shutting down a power supply at the occurrence of a fault condition. The circuit arrangement allows current limiting in a switching transistor during a power on and/or power off cycle, but shuts down the power supply if current limiting occurs at any other time.

摘要翻译： 提供保护电路装置，用于在发生故障状态时关闭电源。 电路布置允许在上电和/或断电周期期间开关晶体管中的电流限制，但是如果在任何其他时间发生电流限制，则关闭电源。

公开(公告)号：US5079666A

公开(公告)日：1992-01-07

申请号：US401280

申请日：1989-08-31

申请人： Elie M. Najm

发明人： Elie M. Najm

IPC分类号： H04N5/63 ,  H02H3/08 ,  H02H3/20 ,  H02H7/12 ,  H02H7/122

CPC分类号： H02H7/1213 ,  H02H7/122

摘要： A power supply for a video display device includes a protection circuitry which shutdown the power supply to prevent damage to the power supply or the display device. The protection circuitry monitors sync pulses generated in the video display device and disables the power supply switching transistor in the absence of the sync pulses. The protection circuitry is triggered in the event a fault occurs in the power supply or the video display device.

公开(公告)号：US4812959A

公开(公告)日：1989-03-14

申请号：US52673

申请日：1987-05-20

申请人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

发明人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

IPC分类号： H02M3/28 ,  H02M3/335 ,  H02M3/338 ,  H03K3/30

CPC分类号： H03K3/30 ,  H02M3/33523 ,  H02M3/3385

摘要： A non-interfering power supply includes a free-running blocking oscillator power supply subsystem and a circuit arrangement that synchronizes the blocking oscillator power supply subsystem to operate at the horizontal operating frequency of a display subsystem. Synchronizing signals representative of the horizontal operating frequency of the display subsystem are generated and are used to activate the circuit arrangement that causes the blocking oscillator to change its mode of operation from free-running to a fully reset fixed frequency flyback converter. When activated, a switch in the circuit arrangement extends the off-time of a switching transistor in the blocking oscillator power supply control circuit. As a result, the oscillator is forced to run at an operating frequency lower than its free-running frequency.