利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.016 秒)

    Primary side PFC driver with dimming capability
    1.
    发明授权
    Primary side PFC driver with dimming capability 有权
    具有调光能力的初级侧PFC驱动器

    公开(公告)号：US08502474B2

    公开(公告)日：2013-08-06

    申请号：US13249158

    申请日：2011-09-29

    申请人： Jeff Kotowski ,  Charles Cai ,  Ranajit Ghoman

    发明人： Jeff Kotowski ,  Charles Cai ,  Ranajit Ghoman

    IPC分类号： G05F1/00

    CPC分类号： H05B33/0815 ,  H02M1/4225 ,  Y02B20/346 ,  Y02B70/126

    摘要： A primary side PFC driver circuit is disclosed that includes a switch control circuit for commanding a switch to allow an inductor coupled to an output load (e.g., LEDs) to transfer energy provided by an input voltage source. The switch control circuit provides two signals for commanding the switch. A first signal having a first frequency, with a duty cycle in proportion to the input voltage amplitude, commands the switch to allow the average input current to be proportional to the input voltage amplitude. A second signal having a second frequency higher than the first frequency pulses the output load with substantially constant current pulses based on a value of the first signal (e.g., while the first signal is high). The current pulses produce a substantially constant current in the output load.

    摘要翻译： 公开了一种初级侧PFC驱动器电路，其包括用于命令开关允许耦合到输出负载（例如，LED）的电感器传递由输入电压源提供的能量的开关控制电路。 开关控制电路提供两个指示开关的信号。 具有与输入电压幅度成比例的占空比的具有第一频率的第一信号命令开关允许平均输入电流与输入电压幅度成正比。 具有高于第一频率的第二频率的第二信号基于第一信号的值（例如，当第一信号为高时）以基本上恒定的电流脉冲来脉冲输出负载。 电流脉冲在输出负载中产生基本恒定的电流。

    Multi-Channel Driver Equalizer
    2.
    发明申请
    Multi-Channel Driver Equalizer 有权
    多通道驱动均衡器

    公开(公告)号：US20130099697A1

    公开(公告)日：2013-04-25

    申请号：US13281366

    申请日：2011-10-25

    申请人： Sean S. Chen ,  Jeff Kotowski ,  Timothy James Herklots

    发明人： Sean S. Chen ,  Jeff Kotowski ,  Timothy James Herklots

    IPC分类号： H05B37/02

    CPC分类号： G09G3/342 ,  G09G2320/0233 ,  G09G2320/064

    摘要： The disclosed multi-channel driver equalizer circuit matches currents in multiple strings of illumination devices at low current levels by using an analog equalizer to sequentially couple the output of a reference amplifier in series with each current source amplifier in a current limit loop of the driver equalizer circuit to correct the offsets of the current source amplifiers, resulting in the matching of string currents on average.

    摘要翻译： 所公开的多通道驱动均衡器电路通过使用模拟均衡器在多个照明装置串中的电流匹配电流，所述模拟均衡器在驱动器均衡器的限流回路中将参考放大器的输出与每个电流源放大器串联耦合 电路来校正电流源放大器的偏移，导致串电流的匹配平均。

    Precision relaxation oscillator without comparator delay errors
    3.
    发明授权
    Precision relaxation oscillator without comparator delay errors 有权
    精密放大振荡器，无比较器延时误差

    公开(公告)号：US07109804B2

    公开(公告)日：2006-09-19

    申请号：US10834326

    申请日：2004-04-27

    申请人： Urs H. Mader ,  Yvonne Ko ,  Franco Cocetta ,  Jeff Kotowski ,  Xiaoying Yu

    发明人： Urs H. Mader ,  Yvonne Ko ,  Franco Cocetta ,  Jeff Kotowski ,  Xiaoying Yu

    IPC分类号： H03L7/00 ,  H03B5/10

    CPC分类号： H03K4/502

    摘要： A relaxation oscillator for generating an oscillator output signal having a predetermined frequency. The relaxation oscillator includes an interleaved charge pump for providing a restoring charge to an integrator in response to at least one charge pump control signal. The relaxation oscillator further includes an integrator having an integrator input connected to the current summing node. The integrator is adapted to produce an integrator output signal having the predetermined frequency at an integrator output. A comparator having an input connected to the integrator output is adapted to generate the oscillator output signal having the predetermined frequency in response to the integrator output signal.

    摘要翻译： 一种放大振荡器，用于产生具有预定频率的振荡器输出信号。 弛豫振荡器包括交错电荷泵，用于响应于至少一个电荷泵控制信号向积分器提供恢复电荷。 弛豫振荡器还包括具有连接到当前求和节点的积分器输入的积分器。 积分器适于在积分器输出处产生具有预定频率的积分器输出信号。 具有连接到积分器输出的输入的比较器适于响应于积分器输出信号产生具有预定频率的振荡器输出信号。

    Power conversion feedback control circuit for reaching a goal voltage
    4.
    发明授权
    Power conversion feedback control circuit for reaching a goal voltage 有权
    用于达到目标电压的功率转换反馈控制电路

    公开(公告)号：US08912770B2

    公开(公告)日：2014-12-16

    申请号：US13289603

    申请日：2011-11-04

    申请人： Charles Cai ,  Jeff Kotowski ,  Kien Vi

    发明人： Charles Cai ,  Jeff Kotowski ,  Kien Vi

    IPC分类号： G05F1/563 ,  H02M3/158 ,  H05B37/02 ,  H02M3/156

    CPC分类号： H02M3/158 ,  H02M3/156 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0842 ,  H05B37/02 ,  Y02B20/343 ,  Y02B20/42 ,  Y10S323/901

    摘要： A power conversion circuit of two feedback loops is disclosed that includes a feedback control circuit for ramping up or down a commanded voltage to a load (e.g., LEDs). The second feedback loop feeds into the first feedback loop, and the second feedback loop operates at a slower bandwidth than the first feedback loop. When ramping up or down the commanded voltage, a voltage overshoot results because of delay in the system. The overshoot can be compensated for by a final adjustment to the commanded voltage.

    摘要翻译： 公开了两个反馈回路的功率转换电路，其包括用于将指令电压上升或下降到负载（例如，LED）的反馈控制电路。 第二反馈环馈入第一反馈环路，第二反馈环路以比第一反馈环路更慢的带宽工作。 当升高或降低指令电压时，由于系统的延迟而导致电压过冲。 可以通过对指令电压进行最终调整来补偿过冲。

    Circuit for Driving Light Emitting Elements
    5.
    发明申请
    Circuit for Driving Light Emitting Elements 有权
    驱动发光元件的电路

    公开(公告)号：US20130134889A1

    公开(公告)日：2013-05-30

    申请号：US13308190

    申请日：2011-11-30

    申请人： Sean S. Chen ,  Jeff Kotowski ,  Timothy James Herklots

    发明人： Sean S. Chen ,  Jeff Kotowski ,  Timothy James Herklots

    IPC分类号： H05B37/00

    CPC分类号： H05B33/0815

    摘要： In one novel aspect, driving a string of light emitting elements, such as LEDs, includes applying a drive signal to circuitry that regulates a voltage appearing at a source of a transistor whose drain is coupled to one end of the string of light emitting elements and whose source is coupled to ground through a resistive element. Sequencing of the drive signal and a voltage supply signal for the light emitting elements is controlled such that the voltage supply signal is not increased above a predetermined allowable voltage for the transistor until the transistor is turned on, and such that the supply voltage is not decreased below the allowable voltage for the transistor until the transistor is turned off.

    摘要翻译： 在一个新颖的方面，驱动一串发光元件（例如LED）包括将驱动信号施加到电路，该电路调节出现在其漏极耦合到发光元件串的一端的晶体管的源极处的电压，以及 其源极通过电阻元件耦合到地。 控制驱动信号的排序和发光元件的电压供给信号，使得电压供给信号在晶体管导通之前没有增加到晶体管的预定容许电压以上，并且电源电压不降低 低于晶体管的允许电压，直到晶体管关断。

    Watt-hour meter with digital per-phase power factor compensation
    8.
    发明授权
    Watt-hour meter with digital per-phase power factor compensation 失效
    具有数字每相功率因数补偿的瓦特表

    公开(公告)号：US06377037B1

    公开(公告)日：2002-04-23

    申请号：US08904706

    申请日：1997-08-01

    申请人： Gordon R. Burns ,  Javier Adame ,  John T. Voisine ,  John P. Junker ,  Jeff Kotowski ,  Richard D. Davis

    发明人： Gordon R. Burns ,  Javier Adame ,  John T. Voisine ,  John P. Junker ,  Jeff Kotowski ,  Richard D. Davis

    IPC分类号： G01R2106

    CPC分类号： G01R21/133

    摘要： A watt-hour meter employs a power factor compensation technique that inserts a delay into the digitized current or voltage sample stream. An exemplary embodiment of the present invention includes an electronic watt-hour meter comprising a voltage sensor, a current sensor, a conversion circuit, and a processing circuit: The voltage sensor generates a voltage measurement signal responsive to a voltage provided to a load. Similarly, the current sensor generates a current measurement signal responsive to a current provided to a load. The conversion circuit further comprises: a first converter connected to the voltage sensor for generating sampled voltage data stream based on said voltage measurement signal; a second converter connected to the current sensor for generating a sampled current data stream based on said current measurement signal, and a phase correction circuit. The phase correction circuit is connected to one of the first and second converters and inserts a delay into one of the sampled voltage data stream or the sampled current data stream. The processing circuit is operably connected to the first and second converters, and receives information indicative of the sampled voltage data stream and sampled current data stream subject to any delay inserted by the phase correction circuit. The processing circuit then generates power consumption data from the sampled voltage data and sampled current data.

    摘要翻译： 电度表采用功率因数补偿技术，将延迟插入数字化电流或电压采样流。 本发明的一个示例性实施例包括一个包括电压传感器，电流传感器，转换电路和处理电路的电子电度表。电压传感器根据提供给负载的电压产生电压测量信号。 类似地，电流传感器响应于提供给负载的电流产生电流测量信号。 转换电路还包括：连接到电压传感器的第一转换器，用于基于所述电压测量信号产生采样的电压数据流; 连接到电流传感器的第二转换器，用于基于所述电流测量信号产生采样的当前数据流，以及相位校正电路。 相位校正电路连接到第一和第二转换器之一，并将延迟插入采样的电压数据流或采样的当前数据流之一。 处理电路可操作地连接到第一和第二转换器，并且接收指示采样的电压数据流的信息和经相位校正电路插入的任何延迟的采样的当前数据流。 处理电路然后从采样的电压数据和采样的当前数据产生功耗数据。