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    • 36. 发明授权
    • AGC circuit, AGC circuit gain control method, and program for the AGC circuit gain control method
    • AGC电路,AGC电路增益控制方法和AGC电路增益控制方法的程序
    • US07233200B2
    • 2007-06-19
    • US11057232
    • 2005-02-15
    • Eiichi Yamada
    • Eiichi Yamada
    • H03G3/20
    • G11B20/10027G11B20/10009H03G7/007
    • The present invention relates to an AGC circuit, a AGC circuit gain control method, and a program for the AGC circuit gain control method, and may be applied to IC recorders, for example, as a portable recording/reproducing device, in order to ameliorate problems of listening to talk, music and the like during playback from IC recorders. In the invention, a signal level L1cyc is detected in units of the period of an input signal, and a recovery time constant r is switched on the basis of a decision as to the signal level L1cyc based on an average shift Lavg of the signal level L1cyc.
    • AGC电路,AGC电路增益控制方法以及用于AGC电路增益控制方法的程序本发明涉及AGC电路,AGC电路增益控制方法和用于AGC电路增益控制方法的程序,并且可以应用于例如作为便携式记录/再现装置的IC记录器,以便改善 在从IC录音机播放期间听话音,音乐等的问题。 在本发明中,以输入信号的周期为单位检测信号电平L 1 Cyc,并且基于基于平均移位Lavg的信号电平L 1 cyc的判定来切换恢复时间常数r 的信号电平L 1 cyc。