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41 条记录 (耗时 0.029 秒)

    Capless Regulator Overshoot and Undershoot Regulation Circuit
    4.
    发明申请
    Capless Regulator Overshoot and Undershoot Regulation Circuit 有权
    无功调节器过冲和欠压调节电路

    公开(公告)号：US20120086420A1

    公开(公告)日：2012-04-12

    申请号：US12901868

    申请日：2010-10-11

    申请人： John Wayne Simmons ,  Kai Zhong

    发明人： John Wayne Simmons ,  Kai Zhong

    IPC分类号： G05F1/00

    CPC分类号： G05F1/575

    摘要： Systems and methods for reducing voltage undershoot and overshoot of a voltage regulator are disclosed. In one embodiment of the present disclosure, an undershoot/overshoot regulation circuit comprises a control node having a control voltage. The regulation circuit also comprises a control circuit configured to increase the control voltage in response to a load being applied to an output node of a voltage regulator and decrease the control voltage in response to the load being removed from the output node. The regulation circuit also comprises a control capacitor including a first terminal coupled to the control node and a second terminal coupled to a gate node of the voltage regulator. The control capacitor is configured to increase a gate voltage at the gate node in response to the increase of the control voltage, and decrease the gate voltage in response to the decrease of the control voltage.

    摘要翻译： 公开了用于减小电压调节器的电压下冲和过冲的系统和方法。 在本公开的一个实施例中，下冲/超调调节电路包括具有控制电压的控制节点。 调节电路还包括控制电路，其被配置为响应于施加到电压调节器的输出节点的负载而增加控制电压，并且响应于从输出节点移除负载而减小控制电压。 调节电路还包括控制电容器，其包括耦合到控制节点的第一端子和耦合到电压调节器的栅极节点的第二端子。 控制电容器被配置为响应于控制电压的增加而增加栅极节点处的栅极电压，并且响应于控制电压的降低而降低栅极电压。

    Radio receiver and method of calibrating same
    8.
    发明授权
    Radio receiver and method of calibrating same 失效
    无线电接收机及其校准方法

    公开(公告)号：US5701600A

    公开(公告)日：1997-12-23

    申请号：US502997

    申请日：1995-07-17

    申请人： John Wetters ,  John Wayne Simmons ,  Virgilio Alejandro Fernandez ,  Art Ahrens ,  Steve Carsello

    发明人： John Wetters ,  John Wayne Simmons ,  Virgilio Alejandro Fernandez ,  Art Ahrens ,  Steve Carsello

    IPC分类号： H03J1/00 ,  H04B1/16

    CPC分类号： H03J1/0008 ,  H03J2200/28

    摘要： A method of calibrating a radio receiver (100) which has a desired IF center frequency (fo) includes generating and applying to the receiver's demodulator (126) a plurality of reference signals. The demodulated reference signals are used to generate, for the demodulator, a transfer function that is predictive of amplitude versus frequency characteristics of signals to be demodulated by the demodulator (126). The transfer function (202) is used to determine a frequency offset between a received signal's intermediate frequency and the desired frequency fo. The determined frequency offset is used to adjust the IF frequency of the received signal towards the desired frequency fo. The adjustment process preferably continues until the frequency offset is below a desired threshold. A receiver using the disclosed method is also described.

    摘要翻译： 校准具有期望的IF中心频率（fo）的无线电接收机（100）的方法包括生成并向接收机的解调器（126）应用多个参考信号。 解调的参考信号用于为解调器产生预测由解调器（126）解调的信号的幅度 - 频率特性的传递函数。 传递函数（202）用于确定接收信号的中间频率和期望频率fo之间的频率偏移。 所确定的频率偏移用于将接收到的信号的IF频率调整到期望的频率fo。 调整过程优选地继续直到频率偏移低于期望的阈值。 还描述了使用所公开的方法的接收机。