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    • 2. 发明授权
    • Digital level indicating device
    • 数字电平指示装置
    • US4870349A
    • 1989-09-26
    • US87080
    • 1987-08-19
    • Shizuo KakiuchiHiroshi Iizuka
    • Shizuo KakiuchiHiroshi Iizuka
    • G01D7/02G01D7/08G01R13/00G01R19/04
    • G01D7/08G01D7/02G01R13/00G01R19/04
    • A digital level indicating device for use in compact disk players digital audio tape recorders, etc., which includes a converter circuit for converting a digital signal applied thereto to an absolute value signal representative of an absolute value of the digital signal. A peak holding circuit detects and holds a peak of the absolute value signal. A first decoder log-converts the absolute value signal. A second decoder log-converts a signal held by the peak holding circuit. Indicator means display a level of the digital signal in accordance without puts from both the first and second decoder. A selector switches the choices of resolution of the first decoder and the second decoder.
    • 一种用于压缩盘播放器数字音频磁带录像机等的数字电平指示装置,其包括用于将施加到其上的数字信号转换为表示数字信号的绝对值的绝对值信号的转换器电路。 峰值保持电路检测并保持绝对值信号的峰值。 第一解码器对绝对值信号进行对数转换。 第二解码器对由峰值保持电路保持的信号进行对数转换。 指示符意味着根据没有来自第一和第二解码器的放置来显示数字信号的电平。 A选择器切换第一解码器和第二解码器的分辨率的选择。
    • 4. 发明授权
    • Digital level indicating device
    • 数字电平指示装置
    • US4931724A
    • 1990-06-05
    • US382875
    • 1989-07-21
    • Shizuo KakiuchiHiroshi Iizuka
    • Shizuo KakiuchiHiroshi Iizuka
    • G01D7/02G01D7/08G01R19/04
    • G01D7/08G01D7/02G01R19/04
    • A digital level indicating device for use in compact disk players digital audio tape recorders, etc., which includes a converter circuit for converting a digital signal applied thereto to an absolute value signal representative of an absolute value of the digital signal. A peak holding circuit detects and holds a peak of the absolute value signal. A first decoder log-converts the absolute value signal. A second decoder log-converts a signal held by the peak holding circuit. Indicator means display a level of the digital signal in accordance with outputs from both the first and second decoder. A selector switches the choices of resolution of the first decoder and the second decoder.
    • 一种用于压缩盘播放器数字音频磁带录像机等的数字电平指示装置,其包括用于将施加到其上的数字信号转换为表示数字信号的绝对值的绝对值信号的转换器电路。 峰值保持电路检测并保持绝对值信号的峰值。 第一解码器对绝对值信号进行对数转换。 第二解码器对由峰值保持电路保持的信号进行对数转换。 指示符表示根据来自第一和第二解码器的输出显示数字信号的电平。 A选择器切换第一解码器和第二解码器的分辨率的选择。