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    CHARGE PUMP CIRCUIT
    1.
    发明申请
    CHARGE PUMP CIRCUIT 审中-公开
    充电泵电路

    公开(公告)号：WO2012085598A3

    公开(公告)日：2012-11-15

    申请号：PCT/GB2011052580

    申请日：2011-12-23

    Applicant: WOLFSON MICROELECTRONICS PLC ,  LESSO JOHN PAUL ,  FRITH PETER JOHN ,  PENNOCK JOHN LAURENCE

    Inventor： LESSO JOHN PAUL ,  FRITH PETER JOHN ,  PENNOCK JOHN LAURENCE

    IPC: H02M3/07 ,  H02M1/00

    CPC classification number: H02M3/07 ,  H02M1/00 ,  H02M2001/0083 ,  H02M2001/009 ,  H03F3/181

    Abstract: A bipolar output charge pump circuit 100 is provided having a network of switching paths 110 for selectively connecting an input node (VV) and a reference node (VG) for connection to an input voltage, a first pair of output nodes (VP, VN) and a second pair of output nodes (VQ, VM), and two pairs of flying capacitor nodes (CF1A, CF1B; CF2A, CF2B), and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors (CF1, CF2) connected to the two pairs of flying capacitor nodes, to provide a first bipolar output voltage at the first pair of output nodes (VP, VN) and a second bipolar output voltage at the second pair of bipolar output nodes (VQ, VM).

    Abstract translation: 提供双极性输出电荷泵电路100，其具有用于选择性地连接用于连接到输入电压的输入节点（VV）和参考节点（VG）的开关路径110的网络，第一对输出节点（VP，VN） 以及第二对输出节点（VQ，VM）和两对飞行电容器节点（CF1A，CF1B; CF2A，CF2B）和用于控制交换路径网络的切换的控制器。 控制器可操作以在与两对飞跨电容器节点连接的两个飞行电容器（CF1，CF2）使用时控制开关路径网络，以在第一对输出节点（VP， VN）和在第二对双极输出节点（VQ，VM）处的第二双极性输出电压。

    Charge pump circuit
    2.
    发明专利
    Charge pump circuit 未知

    公开(公告)号：GB2486701B

    公开(公告)日：2013-01-09

    申请号：GB201021810

    申请日：2010-12-23

    Applicant: WOLFSON MICROELECTRONICS PLC

    Inventor： LESSO JOHN PAUL ,  PENNOCK JOHN LAURENCE ,  FRITH PETER JOHN

    IPC: H02M1/00 ,  H02M3/07

    Abstract: A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes and a second pair of output nodes, and two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first bipolar output voltage at the first pair of output nodes and a second bipolar output voltage at the second pair of bipolar output nodes.

    DC-DC converter circuit using four switches
    4.
    发明专利
    DC-DC converter circuit using four switches 未知

    公开(公告)号：GB2484010A

    公开(公告)日：2012-03-28

    申请号：GB201116744

    申请日：2006-08-31

    Applicant: WOLFSON MICROELECTRONICS PLC

    Inventor： LESSO JOHN PAUL ,  PENNOCK JOHN LAURENCE

    IPC: H02M3/155

    Abstract: A DC-DC converter circuit comprising a switch network for converting a voltage input terminal, inductor terminal and first and second output terminal wherein the switch network is arranged such that four switches of the network can be operated in use to generate a positive output voltage at the first output terminal and a negative output voltage at the second output terminal. The invention is of particular use in an audio amplifier.

    Amplifier
    6.
    发明专利
    Amplifier 未知

    公开(公告)号：GB2408644B

    公开(公告)日：2007-04-25

    申请号：GB0327539

    申请日：2003-11-26

    Applicant: WOLFSON LTD ,  WOLFSON MICROELECTRONICS PLC

    Inventor： RICHARD PATRICK ETIENNE ,  PENNOCK JOHN LAURENCE

    IPC: H03F3/213 ,  H03F3/04 ,  H03F3/181 ,  H03F3/30 ,  H04R5/04

    Abstract: An amplifier is disclosed, having an input stage connected to an output stage. The input stage is connected between a positive supply rail and a ground rail and has an input terminal arranged to receive an input signal. The output stage is connected between a positive supply rail and a negative supply rail and has an output terminal. The output stage is adapted to generate an output signal, which is dependent on a received input signal, at the output, and is further adapted such that, in use, a quiescent voltage at the output terminal is at a selected value between a voltage on the positive supply rail and a voltage on the negative supply rail. For driving a grounded load, the quiescent output voltage is preferably zero volts. In preferred embodiments, the input and output stages are formed on a common substrate using CMOS technology, the output stage including one or more NMOS devices having a triple-well structure. A corresponding method of driving a grounded load is also disclosed.

    Biasing circuitry for MEMS transducers
    9.
    发明专利
    Biasing circuitry for MEMS transducers 未知

    公开(公告)号：GB2521416A

    公开(公告)日：2015-06-24

    申请号：GB201322496

    申请日：2013-12-19

    Applicant: WOLFSON MICROELECTRONICS PLC

    Inventor： ASTGIMATH SANTOSH ,  LASSEUGUETTE JEAN ,  PENNOCK JOHN LAURENCE

    IPC: H03F3/187 ,  G05F3/30 ,  H04R3/00

    Abstract: The switched capacitor voltage converter 102, which may be used to provide a high voltage to bias a MEMS microphone, causes dips in the reference voltage VBG in each cycle because charge is taken from this node to recharge the input capacitors CCP and CCPB. The control circuit 201 of the reference voltage generator acts to restore the reference voltage, but this action is accompanied by a transient in the voltage VPG at the gate of the transistor 202. The current IXA in the transistor 202 may be mirrored in transistor 301 to provide a bias current IXB to a source follower preamplifier (103, figure 3) for the MEMS microphone output signal. To prevent the transient in the node VPG causing a transient in the preamplifier bias current IXB, the switch 601 is opened for a short time interval whenever either of the capacitors CCP or CCPB is connected to the reference voltage VBG. The capacitor CC2 reduces the duration of the transient.

    Charge pump circuit
    10.
    发明专利
    Charge pump circuit 未知

    公开(公告)号：GB2486698B

    公开(公告)日：2014-01-15

    申请号：GB201021801

    申请日：2010-12-23

    Applicant: WOLFSON MICROELECTRONICS PLC

    Inventor： LESSO JOHN PAUL ,  PENNOCK JOHN LAURENCE ,  FRITH PETER JOHN

    IPC: H02M3/07

    Abstract: A bipolar output charge pump circuit 100 is provided having a network of switching paths 110 for selectively connecting an input node (VV) and a reference node (VG) for connection to an input voltage, a first pair of output nodes (VP, VN), two pairs of flying capacitor nodes (CF1A, CF1B; CF2A, CF2B), and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors (CF1, CF2) connected to the two pairs of flying capacitor nodes, to provide a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes, wherein at least the first mode corresponds to a bipolar output voltage of +/-3VV, +/-VV/5 or +/-VV/6.

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