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    Measurement of power supply dc current by means of a small ac current
    4.
    发明授权
    Measurement of power supply dc current by means of a small ac current 失效
    通过小交流电流测量电源直流电流

    公开(公告)号：US5764047A

    公开(公告)日：1998-06-09

    申请号：US891414

    申请日：1997-07-09

    申请人： Harold L. Massie

    发明人： Harold L. Massie

    IPC分类号： G01R31/40 ,  G01R33/00

    CPC分类号： G01R31/40

    摘要： An apparatus for measuring the dc current in a power supply circuit includes a transformer having a primary winding, a core and a secondary winding, a current generator, a pulse generator, and a measurement circuit. The secondary winding of the transformer is coupled to the power supply circuit, wherein the power supply circuit supplies dc current to the secondary winding generating a second field of magnetic flux. The current generator, coupled to the primary winding of the transformer, supplies an ac current to the primary winding generating a first field of magnetic flux. The pulse generator, coupled to the primary winding, generates a pulse when the first field of magnetic flux is substantially equal to the second field of magnetic flux. The measuring circuit, coupled to the current generator and responsive to the pulse generator, measures the ac current from the current generator in response to a pulse received from the pulse generator, wherein the ac current is proportional to the dc current.

    摘要翻译： 用于测量电源电路中的直流电流的装置包括具有初级绕组，铁芯和次级绕组的变压器，电流发生器，脉冲发生器和测量电路。 变压器的次级绕组耦合到电源电路，其中电源电路向次级绕组提供直流电流，产生第二磁通场。 耦合到变压器的初级绕组的电流发生器向初级绕组提供交流电流，产生第一磁通场。 耦合到初级绕组的脉冲发生器当磁通的第一场基本上等于第二磁通场时产生脉冲。 耦合到电流发生器并响应于脉冲发生器的测量电路响应于从脉冲发生器接收的脉冲测量来自电流发生器的交流电流，其中交流电流与直流电流成比例。

    High precision fan control/alarm circuit
    6.
    发明授权
    High precision fan control/alarm circuit 失效
    高精度风扇控制/报警电路

    公开(公告)号：US5831405A

    公开(公告)日：1998-11-03

    申请号：US649353

    申请日：1996-05-17

    申请人： Harold L. Massie

    发明人： Harold L. Massie

    IPC分类号： G05B5/00

    CPC分类号： G06F1/206 ,  Y10S388/934

    摘要： A motor speed control circuit includes a temperature sensor providing a first voltage output which is proportional to the temperature and a control voltage generator having an internal voltage reference receiving the first output as an input. The control voltage generator develops a control voltage representative of a desired motor speed profile which varies substantially linearly between a first predetermined temperature and a second predetermined temperature and supplies the control voltage to a motor drive circuit with a motor drive voltage at its output. The control voltage is fed back to the temperature sensor to achieve a controlled, fast rising slope. A second feedback circuit results in a reduced slope of the voltage between the second predetermined temperature and a third predetermined temperature at which an alarm signal is generated. The circuit also is able to detect a stopped motor and provide an alarm.

    摘要翻译： 电动机速度控制电路包括提供与温度成比例的第一电压输出的温度传感器和具有接收第一输出的内部参考电压作为输入的控制电压发生器。 控制电压发生器产生表示在第一预定温度和第二预定温度之间基本上线性变化的期望电动机速度分布的控制电压，并且将控制电压提供给其输出处的电动机驱动电压的电动机驱动电路。 控制电压反馈到温度传感器，以实现受控的快速上升斜率。 第二反馈电路导致第二预定温度和产生报警信号的第三预定温度之间的电压的斜率减小。 该电路还能够检测到停止的电机并提供报警。

    Multiple output DC-DC converter with different ranges of output assurance and capable of tolerating load transients
    7.
    发明授权
    Multiple output DC-DC converter with different ranges of output assurance and capable of tolerating load transients 失效
    多输出DC-DC转换器具有不同的输出保证范围，并且能够容忍负载瞬变

    公开(公告)号：US5455501A

    公开(公告)日：1995-10-03

    申请号：US217643

    申请日：1994-03-24

    申请人： Harold L. Massie

    发明人： Harold L. Massie

    IPC分类号： G05F1/577 ,  H02M3/335

    CPC分类号： G05F1/577 ,  H02M3/33561 ,  Y10T307/505

    摘要： A primary voltage generation circuitry and an auxiliary voltage generation circuitry is provided to a DC-DC converter. The primary voltage generation circuitry generates a primary voltage output, and the auxiliary voltage generation circuitry, in cooperation with the primary voltage generation circuitry, generates an auxiliary voltage output. The primary voltage generation circuitry includes a switching circuit element and an inductor element, whereas the auxiliary voltage generation circuitry includes an inductor element complementary to the inductor element of the primary voltage generation circuitry. The inductor element of the auxiliary voltage generation circuitry references the primary voltage output, and relies on a minimum load at the primary voltage output. Preferably, the auxiliary voltage generation circuitry further includes reference circuitry elements for regulating the auxiliary voltage output to a precise assurance range. As a result, multiple high precision voltage outputs are generated efficiently by the DC-DC converter in a cost effective manner.

    摘要翻译： 向DC-DC转换器提供初级电压产生电路和辅助电压产生电路。 主电压产生电路产生初级电压输出，辅助电压产生电路与初级电压产生电路协同产生辅助电压输出。 主电压产生电路包括开关电路元件和电感器元件，而辅助电压产生电路包括与初级电压产生电路的电感器元件互补的电感器元件。 辅助电压产生电路的电感器元件参考初级电压输出，并且依赖于初级电压输出处的最小负载。 优选地，辅助电压产生电路还包括用于将辅助电压输出调节到精确保证范围的参考电路元件。 结果，以成本有效的方式，由DC-DC转换器有效地产生多个高精度电压输出。

    Circuit and method for driving a junction field effect transistor
    8.
    发明授权
    Circuit and method for driving a junction field effect transistor 有权
    用于驱动结型场效应晶体管的电路和方法

    公开(公告)号：US07746156B1

    公开(公告)日：2010-06-29

    申请号：US11787456

    申请日：2007-04-16

    申请人： Harold L. Massie ,  Kuang Ming Daniel Chang

    发明人： Harold L. Massie ,  Kuang Ming Daniel Chang

    IPC分类号： H03K17/687

    CPC分类号： H03K17/063 ,  H03K2217/0036

    摘要： A circuit and method for driving a field effect transistor is disclosed. A switching circuit includes a driver device having a signal input, a supply voltage input, and an output. The driver output is coupled to a JFET. A converter couples to the JFET and provides an output of the switching circuit. When enabled, a switching device couples this switching circuit output to the gate of the JFET, thus causing the JFET to be driven into conduction.

    摘要翻译： 公开了用于驱动场效应晶体管的电路和方法。 开关电路包括具有信号输入，电源电压输入和输出的驱动器装置。 驱动器输出耦合到JFET。 A转换器耦合到JFET并提供开关电路的输出。 当使能时，开关器件将该开关电路输出耦合到JFET的栅极，从而使JFET被驱动成导通。

    Method and apparatus to provide a DC-DC converter with ripple regulation and multiphase current sharing
    9.
    发明授权
    Method and apparatus to provide a DC-DC converter with ripple regulation and multiphase current sharing 有权
    提供具有纹波调节和多相电流共享的DC-DC转换器的方法和装置

    公开(公告)号：US06271650B1

    公开(公告)日：2001-08-07

    申请号：US09548480

    申请日：2000-04-13

    申请人： Harold L. Massie ,  Edward L. Payton

    发明人： Harold L. Massie ,  Edward L. Payton

    IPC分类号： G05F140

    CPC分类号： H02M3/1584

    摘要： A power supply including a DC—DC converter with multiphase current sharing and ripple regulation. In one embodiment, the disclosed power supply includes a plurality of power drivers coupled to supply power to the supply output. The power drivers are cyclically enabled to provide multiphase current sharing. Ripple regulation is provided with a hysteretic comparator that is coupled to receive feedback from the power supply output. The hysteretic comparator is used to clock or advance a select circuit, which is used to cyclically enable each one of the plurality of power drivers. A reset circuit is included to reset the hysteretic comparator in the event that the hysteretic comparator has not switched for an excessive amount of time. A supply current sensor is used to monitor the current drawn by the plurality of power drivers. As the amount of current drawn by any of the plurality of power drivers rises, the on cycle time of the power driver that is delivering power to the power supply output at that particular time is shortened, enabling the next power driver to deliver power.

    摘要翻译： 电源包括具有多相电流共享和纹波调节的DC-DC转换器。 在一个实施例中，所公开的电源包括耦合以向电源输出供电的多个电源驱动器。 电源驱动器循环启用，以提供多相电流共享。 纹波调节器带有滞后比较器，其被耦合以从电源输出接收反馈。 迟滞比较器用于对选择电路进行时钟或前进，该选择电路用于循环地使能多个电源驱动器中的每一个。 在迟滞比较器没有切换过多的时间的情况下，包括复位电路以复位滞后比较器。 供电电流传感器用于监视由多个电源驱动器画出的电流。 随着多个电力驱动器中的任何一个引起的电流量的上升，在该特定时间将功率输送到电源输出的功率驱动器的接通时间缩短，使得下一个电源驱动器能够传送电力。

    Battery charging unit
    10.
    发明授权
    Battery charging unit 失效
    电池充电单元

    公开(公告)号：US5889387A

    公开(公告)日：1999-03-30

    申请号：US764930

    申请日：1996-12-13

    申请人： Harold L. Massie

    发明人： Harold L. Massie

    IPC分类号： H02J7/00 ,  H02M3/156

    CPC分类号： H02M3/156 ,  H02J7/0093 ,  H02M2001/0009

    摘要： A battery charging circuit, particularly useful in a laptop computer system, includes a voltage input terminal coupled to a dc voltage. A first switch couples the voltage input terminal to an output coupled to the battery through a current sense resistor. A first current sink which is on when the charger circuit is on draws current from the input side of the current sense resistor through a first resistor to develop a first voltage. This voltage and a voltage coupled through a second resistor from the battery side of the sense resistor are inputs to a comparator, the output of which controls the first switch. A second current sink, when on, draws current through the second resistor causing the first switch to be held off, turning the charging circuit off. An ON/OFF terminal, to which a variable duty cycle square wave is supplied, controls the turning on and off of the first and second current sinks, with the length of the duty cycle controlling the average current supplied to the battery.

    摘要翻译： 在膝上型计算机系统中特别有用的电池充电电路包括耦合到直流电压的电压输入端子。 第一开关通过电流检测电阻将电压输入端耦合到耦合到电池的输出。 当充电器电路接通时，导通的第一电流吸收器通过第一电阻器从电流检测电阻器的输入端吸取电流，以产生第一电压。 该电压和通过来自检测电阻器的电池侧的第二电阻耦合的电压是输入到比较器，其输出控制第一开关。 第二个电流吸收器在接通时，通过第二个电阻吸入电流，使第一个开关保持关闭，关闭充电电路。 一个供给可变占空比方波的ON / OFF端子控制第一和第二电流吸收器的接通和断开，占空比的长度控制提供给电池的平均电流。