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    Write drive apparatus
    3.
    发明授权
    Write drive apparatus 失效
    写驱动装置

    公开(公告)号：US06532123B1

    公开(公告)日：2003-03-11

    申请号：US09598722

    申请日：2000-06-21

    申请人： Hugo Veenstra ,  Luan Le

    发明人： Hugo Veenstra ,  Luan Le

    IPC分类号： G11B509

    CPC分类号： G11B5/02 ,  G11B5/012 ,  G11B5/09 ,  H03K17/664

    摘要： The invention provides a write driver circuit for writing an information signal on a magnetic record carrier. The write driver circuit comprises a first and a second input terminal (20,22) for receiving the information signal. A first current sink (24) is available, having a first transistor (T3) of a first type, having a first main electrode coupled to the first point of constant potential (+), having a second main electrode coupled to the first input (34) of a write head combination (32) via a first impedance (38), and a control electrode coupled to the first input terminal (20). A second current sink (28) is available having a second transistor (T4) of the first type, having a first main electrode coupled to the first point of constant potential (+), having a second main electrode coupled to the second input (36) of the write head combination via a second impedance (42), and a control electrode coupled to the second input terminal (22). A first current source (26) is available having a third transistor (T1) of the first type, having a first main electrode coupled to the first input (34) of the write head combination, having a second main electrode coupled to a second point of constant potential (−), and a control electrode coupled to the first input terminal (20). Further, a second current source (30) is available having a fourth transistor (T2) of the first type, having a first main electrode coupled to the second input (36) of the write head combination, having a second main electrode coupled to the second point of constant potential (−), and a control electrode coupled to the second input terminal (22).

    摘要翻译： 本发明提供一种用于在磁记录载体上写入信息信号的写入驱动电路。 写驱动器电路包括用于接收信息信号的第一和第二输入端（20,22）。 第一电流吸收器（24）可用，具有第一类型的第一晶体管（T3），具有耦合到恒定电位（+）的第一点的第一主电极，具有耦合到第一输入端的第二主电极 经由第一阻抗（38）的写入头组合（32）的控制电极（34）和耦合到第一输入端子（20）的控制电极。 第二电流吸收器（28）可用，具有第一类型的第二晶体管（T4），具有耦合到恒定电位（+）的第一点的第一主电极，具有耦合到第二输入端（36）的第二主电极 ）和经由第二阻抗（42）的写头组合，以及耦合到第二输入端（22）的控制电极。 第一电流源（26）可用，具有第一类型的第三晶体管（T1），具有耦合到写头组合的第一输入端（34）的第一主电极，具有耦合到第二点的第二主电极 的恒定电位（ - ），以及耦合到所述第一输入端子（20）的控制电极。 此外，第二电流源（30）可用，具有第一类型的第四晶体管（T2），其具有耦合到写入头组合的第二输入端（36）的第一主电极，具有耦合到 第二点为恒定电位（ - ），以及控制电极，耦合到第二输入端子（22）。

    FULL-BRIDGE CIRCUIT, LIQUID JET HEAD, AND LIQUID JET RECORDING DEVICE
    4.
    发明申请
    FULL-BRIDGE CIRCUIT, LIQUID JET HEAD, AND LIQUID JET RECORDING DEVICE 审中-公开

    公开(公告)号：US20180093474A1

    公开(公告)日：2018-04-05

    申请号：US15711799

    申请日：2017-09-21

    申请人： SII Printek Inc.

    发明人： Shunji KAWAMOTO

    IPC分类号： B41J2/045 ,  H03K3/01

    CPC分类号： B41J2/04541 ,  B41J2/0455 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2202/10 ,  H03K3/01 ,  H03K17/664 ,  H03K17/6874 ,  H03K19/20

    摘要： An overvoltage is prevented from being applied to a circuit. A full-bridge circuit is provided with a first switch having an output terminal connected to one end of a capacitive load, and switching output to the output terminal between a power supply and a ground, a second switch having an output terminal connected to the other end of the capacitive load, and switching output to the output terminal between the power supply and the ground, a first waveform generation section adapted to output a drive waveform for driving the first switch, a second waveform generation section adapted to output a drive waveform for driving the second switch, a detection section adapted to detect voltages of the drive waveforms output by the first waveform generation section and the second waveform generation section, and a control section adapted to control the output of either of the switches based on the voltages detected by the detection section.

    Analogue switch
    5.
    发明申请
    Analogue switch 失效
    模拟开关

    公开(公告)号：US20060066385A1

    公开(公告)日：2006-03-30

    申请号：US11231527

    申请日：2005-09-21

    申请人： Alan Dodd ,  Joseph Jenkins ,  Anthony Sullivan

    发明人： Alan Dodd ,  Joseph Jenkins ,  Anthony Sullivan

    IPC分类号： H03K17/687

    CPC分类号： H03K17/68 ,  H03K17/664

    摘要： A switching circuit (20) comprising first and second switch terminals (2,3) and a switch (21). The switch (21) comprises a first bipolar transistor (22), having a collector connected to the first switch terminal (2) and an emitter connected to the second switch terminal (3), and a second bipolar transistor (23), having an emitter connected to the first switch terminal (2) and a collector connected to the second switch terminal (3). The switch (21) can be turned on by supply of a control current to the base of either the first or the second bipolar transistor.

    摘要翻译： 一种包括第一和第二开关端子（2,3）和开关（21）的开关电路（20）。 开关（21）包括第一双极晶体管（22），其具有连接到第一开关端子（2）的集电极和连接到第二开关端子（3）的发射极，以及第二双极晶体管（23） 连接到第一开关端子（2）的发射极和连接到第二开关端子（3）的集电极。 可以通过向第一或第二双极晶体管的基极提供控制电流来接通开关（21）。

    Analogue switch
    7.
    发明授权
    Analogue switch 失效
    模拟开关

    公开(公告)号：US07245174B2

    公开(公告)日：2007-07-17

    申请号：US11231527

    申请日：2005-09-21

    申请人： Alan James Dodd ,  Joseph Andrew Jenkins ,  Anthony Philip Sullivan

    发明人： Alan James Dodd ,  Joseph Andrew Jenkins ,  Anthony Philip Sullivan

    IPC分类号： H03K17/60

    CPC分类号： H03K17/68 ,  H03K17/664

    摘要： A switching circuit (20) comprising first and second switch terminals (2,3) and a switch (21). The switch (21) comprises a first bipolar transistor (22), having a collector connected to the first switch terminal (2) and an emitter connected to the second switch terminal (3), and a second bipolar transistor (23), having an emitter connected to the first switch terminal (2) and a collector connected to the second switch terminal (3). The switch (21) can be turned on by supply of a control current to the base of either the first or the second bipolar transistor.

    摘要翻译： 一种包括第一和第二开关端子（2,3）和开关（21）的开关电路（20）。 开关（21）包括第一双极晶体管（22），其具有连接到第一开关端子（2）的集电极和连接到第二开关端子（3）的发射极，以及第二双极晶体管（23） 连接到第一开关端子（2）的发射极和连接到第二开关端子（3）的集电极。 可以通过向第一或第二双极晶体管的基极提供控制电流来接通开关（21）。

    Circuit for switching current in a mainly inductive load
    8.
    发明授权
    Circuit for switching current in a mainly inductive load 失效
    用于在主要感性负载中切换电流的电路

    公开(公告)号：US5834965A

    公开(公告)日：1998-11-10

    申请号：US764699

    申请日：1996-12-04

    申请人： Patrick LeClerc

    发明人： Patrick LeClerc

    IPC分类号： G11B5/02 ,  G11B5/09 ,  H03K17/66 ,  H03K17/687 ,  H03K17/695

    CPC分类号： G11B5/022 ,  G11B5/09 ,  H03K17/664 ,  H03K17/6874 ,  G11B5/02

    摘要： An "H" type amplifier circuit uses at least two current mirrors for alternately feeding current into the load in one direction and the other direction. In order to accelerate the turn-on of the current mirrors, a capacitance is associated with each of the two current mirrors. Each capacitance is alternately coupled in parallel with the input of its associated current mirror when this current mirror delivers current, and is coupled to the supply voltage terminals when this current mirror delivers no current. The operation is effected by means of a set of switches.

    摘要翻译： “H”型放大器电路使用至少两个电流镜来在一个方向和另一个方向上交替地将电流馈送到负载中。 为了加速电流镜的接通，电容与两个电流镜中的每一个相关联。 当该电流镜传递电流时，每个电容与其相关联的电流镜的输入并联耦合，并且当该电流镜不传递电流时耦合到电源电压端。 该操作通过一组开关来实现。

    Bridge circuit for driving an inductive load with a shoot-through prevention circuit
    9.
    发明授权
    Bridge circuit for driving an inductive load with a shoot-through prevention circuit 失效
    用于通过防穿透电路驱动感性负载的桥接电路

    公开(公告)号：US5469095A

    公开(公告)日：1995-11-21

    申请号：US265854

    申请日：1994-06-27

    申请人： Roger Peppiette ,  Alberto Bilotti

    发明人： Roger Peppiette ,  Alberto Bilotti

    IPC分类号： G05F3/20 ,  H03K17/64 ,  H03K17/66 ,  H03K19/094 ,  G05F1/46

    CPC分类号： G11B5/022 ,  G05F3/20 ,  H03K17/64 ,  H03K17/664

    摘要： A bridge circuit, intended for use as a PWM driver of an inductive load, includes at least one source driver transistor connected in series totem-pole fashion with a sink driver transistor. A base resistor is connected from base to emitter of one of the driver transistors. This totem pole circuit is connected across a pair of DC supply conductors. A protective fly-back diode is connected across the one driver transistor. An auxiliary resistor is connected from the base of the auxiliary transistor to the emitter of the one driver transistor. When a fly-back diode across the one driver transistor conducts, the one driver transistor tends to conduct in the reverse direction and to store charge that in a subsequent period leads to shoot-through currents through the source and sink drivers. The auxiliary transistor turns on only when the fly-back diode conducts and shunts the base-collector of the source transistor, preventing its turning on and storing charge, and thus preventing potentially damaging shoot-through current through the driver transistors. The added auxiliary components do not cause additional power being drawn from the supply source, and therefore do not cause additional heating in the integrated circuit in which the bridge circuit may be formed. A pair of such half wave totem pole circuits may be paralleled to form a full wave bridge.

    摘要翻译： 旨在用作感性负载的PWM驱动器的桥接电路包括至少一个源极驱动器晶体管，其以串联方式串联连接到宿驱动晶体管。 一个基极电阻从一个驱动晶体管的基极耦合到发射极。 该图腾柱电路连接在一对直流电源导体上。 一个驱动晶体管两端连接一个保护性反激式二极管。 辅助电阻从辅助晶体管的基极连接到一个驱动晶体管的发射极。 当一个驱动晶体管上的反激二极管导通时，一个驱动晶体管倾向于反向导通，并且存储电荷，在随后的时间段内导致穿过源极和漏极驱动器的直通电流。 只有当回扫二极管导通和分流源极晶体管的基极集电极时，辅助晶体管导通，防止其导通并存储电荷，从而防止通过驱动晶体管的潜在损坏的直通电流。 添加的辅助部件不会从供应源引起额外的电力，因此不会在可形成桥接电路的集成电路中引起额外的加热。 一对这样的半波图腾柱电路可以并联以形成全波桥。