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    Power supply with re-configurable outputs for different output voltages and method of operation thereof
    31.
    发明授权
    Power supply with re-configurable outputs for different output voltages and method of operation thereof 失效
    电源具有不同输出电压的可重新配置输出及其操作方法

    公开(公告)号：US5949671A

    公开(公告)日：1999-09-07

    申请号：US48246

    申请日：1998-03-25

    Applicant: Victor K. Lee ,  Rui Liu

    Inventor： Victor K. Lee ,  Rui Liu

    IPC: H02M7/17 ,  G05F1/563 ,  H02M1/10 ,  H02M3/335 ,  H02M7/12

    CPC classification number: H02M3/33561

    Abstract: For use with a DC power supply having first and second output rectifying circuits couplable in alternative configurations to provide dual voltages at an output of the DC power supply, an adaptive voltage controller and a method of adaptively controlling the output voltage. In one embodiment, the adaptive voltage controller includes: (1) a configuration determination circuit, coupled to the output, that generates a configuration signal that is a function of a configuration of the first and second output rectifying circuits, (2) a voltage feedback circuit, coupled to the configuration determination circuit, that develops a voltage feedback signal based on the configuration signal and (3) a voltage control circuit, coupled to the voltage feedback circuit, that receives the voltage feedback signal and controls an output voltage of the DC power supply as a function thereof.

    Abstract translation: 用于具有可替换配置的第一和第二输出整流电路的DC电源，以在DC电源的输出端提供双电压，自适应电压控制器和自适应地控制输出电压的方法。 在一个实施例中，自适应电压控制器包括：（1）耦合到输出的配置确定电路，其产生作为第一和第二输出整流电路的配置的函数的配置信号，（2）电压反馈 电路，耦合到配置确定电路，其基于配置信号产生电压反馈信号;以及（3）耦合到电压反馈电路的电压控制电路，其接收电压反馈信号并控制DC的输出电压 电源作为其功能。

    Asymmetrical half-bridge converter having adjustable parasitic resistances to offset output voltage DC bias
    32.
    发明授权
    Asymmetrical half-bridge converter having adjustable parasitic resistances to offset output voltage DC bias 失效
    具有可调寄生电阻以偏移输出电压DC偏置的非对称半桥转换器

    公开(公告)号：US5870291A

    公开(公告)日：1999-02-09

    申请号：US936986

    申请日：1997-09-25

    Applicant: Richard W. Farrington ,  Mark E. Jacobs ,  Rui Liu

    Inventor： Richard W. Farrington ,  Mark E. Jacobs ,  Rui Liu

    IPC: H02M3/335

    CPC classification number: H02M3/33569

    Abstract: An asymmetrical half-bridge converter, a method of operating the same and a power supply that incorporates either the converter or the method. In one embodiment, the converter includes: (1) a power transformer that receives asymmetrical AC input power into a primary winding thereof via an input capacitor, the asymmetrical AC input power inducing a DC bias current in a secondary winding of the power transformer and (2) first and second serially-coupled output inductors coupled across the secondary winding and having parasitic resistances associated therewith that are independently selectable to attenuate the DC bias circuit in the secondary winding.

    Abstract translation: 不对称半桥转换器，其操作方法以及包含转换器或方法的电源。 在一个实施例中，转换器包括：（1）电源变压器，其经由输入电容器将不对称的AC输入功率接收到其初级绕组中，所述非对称AC输入功率引起所述电力变压器的次级绕组中的DC偏置电流， 2）耦合在次级绕组两端并具有与其相关联的寄生电阻的第一和第二串联耦合的输出电感器，其独立地可选择以衰减次级绕组中的DC偏置电路。

    Half-bridge zero-voltage-switched PWM flyback DC/DC converter
    33.
    发明授权
    Half-bridge zero-voltage-switched PWM flyback DC/DC converter 失效
    半桥零电压开关PWM反激式DC / DC转换器

    公开(公告)号：US5808879A

    公开(公告)日：1998-09-15

    申请号：US773117

    申请日：1996-12-26

    Applicant: Rui Liu ,  Wen-Jian Gu

    Inventor： Rui Liu ,  Wen-Jian Gu

    IPC: H02M1/44 ,  H02M3/337 ,  H02M3/335 ,  H02M3/24 ,  G05F1/013

    CPC classification number: H02M1/44 ,  H02M3/337

    Abstract: A DC-DC ZVS PWM converter circuit which utilizes the leakage inductance of an output transformer and a three-step operation cycle so as to reduce the voltage stress on the converter power switching transistors and to reduce the EMI noise emissions of the circuit.

    Abstract translation: DC-DC ZVS PWM转换器电路，利用输出变压器的漏电感和三步操作周期，以降低转换器功率开关晶体管的电压应力，并减少电路的EMI噪声发射。

    Low noise multi-output and multi-resonant flyback converter for television power supplies
    35.
    发明授权
    Low noise multi-output and multi-resonant flyback converter for television power supplies 失效
    用于电视电源的低噪声多输出和多谐振反激转换器

    公开(公告)号：US5528481A

    公开(公告)日：1996-06-18

    申请号：US483919

    申请日：1995-06-07

    Applicant: Paulo Caldeira ,  Rui Liu

    Inventor： Paulo Caldeira ,  Rui Liu

    IPC: H02M1/44 ,  H02M3/335

    CPC classification number: H02M1/44 ,  H02M3/335 ,  Y02B70/1433

    Abstract: A converter for supplying various output voltages for a television receiver includes a multi-resonant circuit, including a resonant inductor, the leakage inductance of a flyback transformer, and a charging capacitor (including the parasitic capacitance of a switching transistor). This arrangement relaxes the slope of the voltages in the converter resulting in reduced radiated EMI. In addition, the values of the inductor and the capacitor are adjusted so that the switching transistor turns on at zero voltage and zero current so that the switching transistor is less stressed and the converter is capable of high frequency operation. Finally, the switching signals applied to the switching transistor are subjected to a filter-delay to lessen the slope of the signals thereby also resulting in a reduction in the EMI radiated from the driving circuit.

    Abstract translation: 用于为电视接收机提供各种输出电压的转换器包括包括谐振电感器，回扫变压器的漏电感和充电电容器（包括开关晶体管的寄生电容）的多谐振电路。 这种布置使转换器中的电压的斜率放松，从而减少辐射EMI。 此外，调节电感器和电容器的值，使得开关晶体管在零电压和零电流下导通，使得开关晶体管的应力较小，并且转换器能够进行高频操作。 最后，施加到开关晶体管的开关信号经受滤波器延迟以减小信号的斜率，从而也导致从驱动电路辐射的EMI的减小。

    Low noise multi-output and multi-resonant forward converter for television power supplies
    36.
    发明授权
    Low noise multi-output and multi-resonant forward converter for television power supplies 失效
    用于电视电源的低噪声多输出和多谐振正激转换器

    公开(公告)号：US5363287A

    公开(公告)日：1994-11-08

    申请号：US203964

    申请日：1994-03-01

    Applicant: Rui Liu ,  Paulo Caldeira

    Inventor： Rui Liu ,  Paulo Caldeira

    IPC: H04N3/18 ,  H02M1/44 ,  H02M3/28 ,  H02M3/335 ,  H04N5/63

    CPC classification number: H02M1/44 ,  H02M3/335 ,  H02M3/33561 ,  H04N5/63 ,  Y02B70/1433

    Abstract: A forward converter for supplying various output voltages for a television receiver includes a multi-resonant circuit, including a resonant inductor, a charging capacitor, and the output capacitors across each secondary winding of an output transformer. This arrangement relaxes the slopes of the voltages in the converter resulting in reduced radiated EMI. In addition, the values of the inductor and the capacitors are adjusted so that a switching transistor in the forward converter turns on at zero voltage and zero current so that the switching transistor is less stressed and the converter is capable of high frequency operation. The secondary providing high voltage includes the series arrangement of two oppositely conducting diode branches, each branch including the series arrangement of a high voltage diode and a Schottky diode. Finally, the switching signals applied to the switching transistor are subjected to a filter-delay to lessen the slope of the signals thereby also resulting in a reduction in the EMI radiated from the driving circuit.

    Abstract translation: 用于为电视接收机提供各种输出电压的正激转换器包括多谐振电路，包括谐振电感器，充电电容器和输出变压器的每个次级绕组上的输出电容器。 这种布置使转换器中的电压斜率放松，从而减少辐射EMI。 此外，调整电感器和电容器的值，使得正向转换器中的开关晶体管在零电压和零电流下导通，使得开关晶体管的应力较小，并且转换器能够进行高频操作。 次级提供高电压包括两个相对导电的二极管分支的串联布置，每个分支包括高压二极管和肖特基二极管的串联布置。 最后，施加到开关晶体管的开关信号经受滤波器延迟以减小信号的斜率，从而也导致从驱动电路辐射的EMI的减小。

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