Method and apparatus for reducing current consumption
    1.
    发明授权
    Method and apparatus for reducing current consumption 有权
    降低电流消耗的方法和装置

    公开(公告)号:US06330234B1

    公开(公告)日:2001-12-11

    申请号:US09559675

    申请日:2000-04-27

    IPC分类号: H04J306

    摘要: A method and apparatus reduces current consumption of a mobile communication unit, such as a cellular or mobile telephone that communicates with a base station by disabling a temperature controlled crystal oscillator and a code generator while the mobile communication unit is in a sleep mode of operation, thereby reducing the sleep mode current consumed by the mobile communication unit. Prior to entering sleep mode, the mobile communications unit stores the state of the code generator and disables the temperature controlled crystal oscillator. Upon waking from sleep mode, the mobile communication unit calculates what the state of its code generator would have been if its temperature controlled crystal oscillator had not been disabled, and uses this calculated state to achieve synchronization with a code generator in the base station.

    摘要翻译: 一种方法和装置通过在移动通信单元处于睡眠操作模式期间禁用温度控制的晶体振荡器和代码生成器来减少与基站通信的移动通信单元(例如蜂窝或移动电话)的电流消耗, 从而减少由移动通信单元消耗的睡眠模式电流。 在进入睡眠模式之前,移动通信单元存储代码发生器的状态并禁止温度控制的晶体振荡器。 当从睡眠模式唤醒时,如果移动通信单元的温度控制晶体振荡器未被禁止,则计算其代码发生器的状态是什么,并且使用该计算状态来实现与基站中的代码生成器的同步。

    Method and apparatus for mitigating noise in an output signal of an
audio automatic gain control circuit
    2.
    发明授权
    Method and apparatus for mitigating noise in an output signal of an audio automatic gain control circuit 失效
    用于减轻音频自动增益控制电路的输出信号中的噪声的方法和装置

    公开(公告)号:US5666384A

    公开(公告)日:1997-09-09

    申请号:US506942

    申请日:1995-07-26

    IPC分类号: H03G3/32 H04B15/00

    CPC分类号: H03G3/32

    摘要: An audio automatic gain control (AGC) circuit (301) employs a method (400, 500) and apparatus (300) for mitigating noise in an output signal (307) of the audio AGC circuit (301). The audio AGC circuit (301) or a circuit coupled to the audio AGC circuit, such as a speech encoder (302), determines (405) whether audio information is present in an input signal (137) to the audio AGC circuit (301). When audio information is not present, the audio AGC circuit (301) applies (411) a gain to the input signal (137) that is less than a current gain being applied, thereby mitigating noise in the audio AGC circuits output signal (220) when audio is not present.

    摘要翻译: 音频自动增益控制(AGC)电路(301)采用减轻音频AGC电路(301)的输出信号(307)中的噪声的方法(400,500)和装置(300)。 音频AGC电路(301)或耦合到诸如语音编码器(302)的音频AGC电路的电路确定(405)音频信息是否存在于音频AGC电路(301)的输入信号(137)中, 。 当不存在音频信息时,音频AGC电路(301)向输入信号(137)施加(411)小于所应用的当前增益的增益,从而减轻音频AGC电路输出信号(220)中的噪声, 当音频不存在时