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    Circuits and methods for output impedance matching in switched mode circuits
    3.
    发明授权
    Circuits and methods for output impedance matching in switched mode circuits 有权
    在开关模式电路中输出阻抗匹配的电路和方法

    公开(公告)号：US06529074B1

    公开(公告)日：2003-03-04

    申请号：US09917311

    申请日：2001-07-26

    申请人： John Laurence Melanson ,  Eric Walburger ,  Johann Guy Gaboriau

    发明人： John Laurence Melanson ,  Eric Walburger ,  Johann Guy Gaboriau

    IPC分类号： H03F3217

    CPC分类号： H03F3/2171 ,  H03F2200/294 ,  H03F2200/372 ,  H03K17/145

    摘要： An output stage 300 includes a first output switch 201 having a current path for driving an output from a first voltage rail and a second output switch 202 having a current path for selectively driving the output from a second voltage rail. A first reference switch 301 is scaled with respects to first output switch 201 and has a current path coupled to the first voltage rail. A second reference switch 302 scaled with respects to second output switch 202 has a current path coupled to a current path of first reference switch 301 at a node and the second voltage rail. The logic measures an impedance mismatch between first and second reference switches 301, 302 and proportionally varies the impedance of a selected one of first and second output switches 201, 202 in response.

    摘要翻译： 输出级300包括具有用于驱动来自第一电压轨的输出的电流路径的第一输出开关201和具有用于选择性地驱动来自第二电压轨的输出的电流路径的第二输出开关202。 第一参考开关301相对于第一输出开关201被缩放，并且具有耦合到第一电压轨的电流路径。 相对于第二输出开关202缩放的第二参考开关302具有耦合到节点处的第一参考开关301的电流路径的电流路径和第二电压轨。 该逻辑测量第一和第二参考开关301,302之间的阻抗不匹配，并且响应地按比例地改变第一和第二输出开关201,202中所选择的一个的阻抗。

    Circuits and methods for slew rate control and current limiting in switch-mode systems
    4.
    发明授权
    Circuits and methods for slew rate control and current limiting in switch-mode systems 有权
    开关模式系统中的转换速率控制和电流限制的电路和方法

    公开(公告)号：US06597240B1

    公开(公告)日：2003-07-22

    申请号：US09825443

    申请日：2001-04-02

    申请人： Eric Walburger ,  John Laurence Melanson

    发明人： Eric Walburger ,  John Laurence Melanson

    IPC分类号： H03F338

    CPC分类号： H03F3/2171 ,  H03F2200/294 ,  H03F2200/372

    摘要： An apparatus and method for limiting the output current in a switched mode amplifier are implemented. The apparatus includes a driver amplifier configurable for selective operation in one of three modes. The amplifier is operable for transitioning between the first mode and one of the second and third modes in response to a state of an output node of the driver. Bias circuitry, configurable for selective coupling to the driver amplifier is operable for limiting the output current of the amplifier in the first operating mode.

    摘要翻译： 实现了用于限制开关模式放大器中的输出电流的装置和方法。 该装置包括可配置为以三种模式之一选择性操作的驱动放大器。 放大器可操作用于响应于驱动器的输出节点的状态在第一模式和第二和第三模式之一之间转换。 可配置用于选择性耦合到驱动放大器的偏置电路可操作用于在第一操作模式中限制放大器的输出电流。