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    Pulse signal generating circuitry, high-voltage power supplying apparatus and image forming apparatus having the same
    2.
    发明公开
    Pulse signal generating circuitry, high-voltage power supplying apparatus and image forming apparatus having the same 有权
    脉冲信号发生电路，电源装置及图像形成装置，所以

    公开(公告)号：EP2339731A3

    公开(公告)日：2014-09-03

    申请号：EP10194217.5

    申请日：2010-12-08

    申请人： Canon Kabushiki Kaisha

    发明人： Takayama, Yuuji ,  Yamaguchi, Atsuhiko

    IPC分类号： H01L41/04 ,  H02M3/335

    CPC分类号： H02M3/33507 ,  H01L41/044

    摘要： Pulse signal generating circuitry (120) generates a pulse signal (iii) for the primary side of a piezoelectric transformer (101). A voltage dependent upon the frequency of the pulse signal is output from the secondary side. The circuitry compares an output voltage (Vout) with a target voltage and changes the frequency of the pulse signal (iii) in dependence upon the comparison results. In a fine adjustment operation the pulse-signal frequency is adjusted, starting from an initial frequency, so as to tend to maintain the output voltage at or close to the target voltage. Prior to the fine adjustment operation, a sweep operation is carried out to set the initial frequency. The pulse-signal frequency is changed step by step from a first frequency to a second frequency at which the output voltage crosses the target voltage. A rate of change of the pulse-signal frequency in the sweep operation is greater than that in at least part of the fine adjustment operation to speed up the rise of the output voltage.

    FEEDBACK FOR STABILIZING DC VOLTAGE PRODUCED FROM RESONANCE CIRCUIT
    4.
    发明公开
    FEEDBACK FOR STABILIZING DC VOLTAGE PRODUCED FROM RESONANCE CIRCUIT 审中-公开
    RÜCKKOPPLUNGZUR STABILISIERUNG VON VON EINEM RESONANZKREIS ERZEUGTER GLEICHSPANNUNG

    公开(公告)号：EP2083509A1

    公开(公告)日：2009-07-29

    申请号：EP07737133.4

    申请日：2007-05-03

    申请人： Imori, Masatoshi

    发明人： Imori, Masatoshi

    IPC分类号： H02M3/00 ,  H02M3/24

    CPC分类号： H02M3/3378 ,  H01L41/044 ,  H02M2001/0019 ,  H02M2001/0022

    摘要： Composition and evaluation are shown about the feedback circuit and its circuit constants which stabilize the direct-current output voltage obtained by rectifying a high-frequency carrier outputted from a resonance circuit against a wide range of load. An equivalent power supply is introduced, including a virtual resonance circuit and a virtual rectification circuit. The virtual resonance circuit, supplied with the same input with a resonance circuit, outputs the envelop of such the carrier that is outputted by the resonance circuit. The virtual rectification circuit, supplied with the envelop of the carrier, works as a first-order delay and outputs the direct-current voltage equivalent with the output of a rectification circuit. The equivalent power supply is described by the system of differential equations. The sufficient condition that the system of differential equations becomes stable is given. The feedback circuit satisfying the sufficient condition is shown to be stable by simulation.

    摘要翻译： 关于反馈电路及其电路常数的组合和评估，其稳定了通过在宽范围的负载下对从谐振电路输出的高频载波进行整流而获得的直流输出电压。 引入了等效电源，包括虚拟谐振电路和虚拟整流电路。 由谐振电路提供相同输入的虚拟谐振电路输出由谐振电路输出的载波的包络线。 提供有载波包络的虚拟整流电路作为一阶延迟，并输出与整流电路的输出等效的直流电压。 等效电源由微分方程系统描述。 给出微分方程组稳定的充分条件。 通过仿真证明满足充分条件的反馈电路是稳定的。

    Piezoelectric transformers
    5.
    发明公开
    Piezoelectric transformers 审中-公开
    Piezoelektrische Transformatoren

    公开(公告)号：EP0955720A3

    公开(公告)日：2004-06-16

    申请号：EP99303545.0

    申请日：1999-05-06

    申请人： Kigass Electronics Ltd.

    发明人： Chuter, Barry Ian

    IPC分类号： H01L41/107 ,  H02M7/48 ,  F23Q3/00

    CPC分类号： H01L41/044 ,  F23Q3/002

    摘要： A circuit (2 to 4) drives a piezo-electric transformer (1) to resonate over a predetermined range of operating conditions over which it has a range of resonant frequencies. The circuit comprises drive means (2 to 4) arranged to produce independently of the transformer (1) a signal having frequencies spanning the range of resonant frequencies for application to the transformer.

    摘要翻译： 电路（2至4）驱动压电变压器（1）在其具有一定谐振频率的工作条件的预定范围内谐振。 该电路包括驱动装置（2至4），其布置成独立于变压器（1）产生具有跨越谐振频率范围的频率的信号以供应用于变压器。

    Switched power converter
    6.
    发明公开
    Switched power converter 审中-公开

    公开(公告)号：EP1220435A2

    公开(公告)日：2002-07-03

    申请号：EP01403182.7

    申请日：2001-12-10

    申请人： ALCATEL

    发明人： Navas Sabater, Jose Andres ,  Rivas Saiz, Mercedes ,  Diaz Gonzales, Juan ,  Martin Ramos, Juan ,  Nuno Garcia, Fernando ,  Jose Prieto, Miguel

    IPC分类号： H02M3/337

    CPC分类号： H02M3/28 ,  H01L41/044

    摘要： The switched power converter comprises a first rectifier module (11-1) connected to a first capacitor (11-2) that, in turn, is connected to an excitation module (11-3) that applies a voltage to some input terminals (PT-1, PT-2) of a piezoelectric transformer (PT).
    A controller device (11-3-3) governs the excitation module (11-3) in order that the piezoelectric transformer (PT) works at constant frequency and regulates the power delivered to the output of the converter by enabling/disabling the voltage applied to the terminals (PT-1, PT-2).
    When the piezoelectric transformer (PT) is not transferring energy between its input terminals (PT-1, PT-2) and its output terminals (PT-3, PT-4), the converter output voltage is supplied by a second capacitor included in a second filter (11-6).

    PIEZO-ELECTRIC TAG
    7.
    发明公开
    PIEZO-ELECTRIC TAG 有权
    压电LABEL

    公开(公告)号：EP1206709A1

    公开(公告)日：2002-05-22

    申请号：EP00949745.4

    申请日：2000-07-31

    申请人： Marconi Data Systems Ltd.

    发明人： Forster, Ian James

    IPC分类号： G01S13/02 ,  G06K19/07

    CPC分类号： H01L41/044 ,  G06K19/067 ,  G06K19/0675 ,  G06K19/0723 ,  H01L41/107

    摘要： The invention provides a piezo-electric tag (10, 300) in the form of a card, the tag (10, 300) incorporating a first dipole antenna (20), a first rectification circuit (30), a piezo-electric transformer (40), a second rectification circuit (50) and a transponder circuit (60). In operation, the antenna (20) receives incoming radiation and generates a corresponding signal Sa which propagates to the first circuit (30) which demodulates and filters it to generate a signal Sb. The signal Sb is applied to the transformer (40) to excite it. The transformer (40) increases the voltage amplitude of the signal Sb by generating a relatively higher voltage amplitude signal Sc which is used in the tag (10, 300) to generate a signal Sd for supplying power to the transponder (60). The transformer (40) provides voltage magnitude enhancement to generate potentials suitable for operating active electronic circuits incorporated into the tag (10, 300). The tag can be personnel wearable and even adapted for permanent inclusion into biological systems.

    SINGLE-INPUT PHASE LOCKING PIEZOELECTRIC TRANSFORMER DRIVING CIRCUIT
    8.
    发明公开
    SINGLE-INPUT PHASE LOCKING PIEZOELECTRIC TRANSFORMER DRIVING CIRCUIT 失效
    控制电路与单输入锁相压电变压器

    公开(公告)号：EP1008190A1

    公开(公告)日：2000-06-14

    申请号：EP98918586.3

    申请日：1998-04-21

    申请人： CTS Corporation

    发明人： MECH, Harold, W.

    IPC分类号： H01L41/00

    CPC分类号： H01L41/044 ,  H02M7/537 ,  Y02B70/1441

    摘要： A circuit (10) for driving a piezoelectric transformer (12) in a phase locked mode without using an external reference signal. The circuit (10) utilizes a 555 timer circuit operated in a stable mode which is responsive to a feedback phase signal (18) coupled from an output signal (20) of the piezoelectric transformer (12). The feedback phase signal (18) overpowers the trigger circuit of the timer to phase lock the timer to an output of the piezoelectric transformer (12) at a resonant frequency of the piezoelectric transformer (12). The circuit (10) provides a simplified phase lock circuit without the need for a typical PLL configuration.