公开(公告)号：US20110006817A1

公开(公告)日：2011-01-13

申请号：US12499781

申请日：2009-07-08

申请人： Song-Rong Han ,  Kuo-Hsiung Wu ,  Chia-Liang Lai

发明人： Song-Rong Han ,  Kuo-Hsiung Wu ,  Chia-Liang Lai

IPC分类号： H03K4/06

CPC分类号： H03K4/06 ,  G06F1/08 ,  H03K3/84

摘要： A triangular wave generator, comprising: a first frequency divider, for utilizing a first positive integer to divide a first frequency of a first periodical signal to generate a first frequency-divided signal; a second frequency divider, for utilizing a second positive integer to divide a second frequency, which equals the first frequency multiplying a third positive integer, of a second periodical signal to generate a second frequency-divided signal; and an up/down counter, for generating a triangular wave first and second frequency-divided frequencies respectively belonging to first and second frequency divided signals; wherein a frequency of the triangular wave equals to the first frequency-divided frequency, and an amplitude of the triangular wave is determined according to a ratio of the first and second frequency-divided frequencies.

摘要翻译： 一种三角波发生器，包括：第一分频器，用于利用第一正整数来分频第一周期信号的第一频率以产生第一分频信号; 第二分频器，用于利用第二正整数来分频第二周期信号的等于第三正整数的第一频率的第二频率以产生第二分频信号; 以及用于产生分别属于第一和第二分频信号的三角波第一和第二分频频率的向上/向下计数器; 其中所述三角波的频率等于所述第一分频频率，并且根据所述第一和第二分频频率的比率来确定所述三角波的振幅。

公开(公告)号：US07724165B2

公开(公告)日：2010-05-25

申请号：US12175220

申请日：2008-07-17

申请人： Che-Min Lin ,  Chiao-Min Chen ,  Kuo-Hsiung Wu

发明人： Che-Min Lin ,  Chiao-Min Chen ,  Kuo-Hsiung Wu

IPC分类号： H03M1/10

CPC分类号： G01R31/3167

摘要： An audio codec and a BIST method adapted for the audio codec are provided. The BIST method includes the following steps. A first channel digital-to-analog converter (DAC) of the audio codec converts a test signal into an analog signal. A first channel analog-to-digital converter (ADC) of the audio codec converts the analog signal into a digital signal. Use a second channel DAC of the audio codec and a second channel ADC of the audio codec to calculate the magnitudes of a plurality of spectral components of the DFT of the digital signal. Determine whether the audio codec passes the test according to the magnitudes of the spectral components.

摘要翻译： 提供了适用于音频编解码器的音频编解码器和BIST方法。 BIST方法包括以下步骤。 音频编解码器的第一通道数/模转换器（DAC）将测试信号转换为模拟信号。 音频编解码器的第一通道模拟 - 数字转换器（ADC）将模拟信号转换为数字信号。 使用音频编解码器的第二通道DAC和音频编解码器的第二通道ADC来计算数字信号的DFT的多个频谱分量的幅度。 确定音频编解码器是否根据频谱分量的大小通过测试。

公开(公告)号：US20100017691A1

公开(公告)日：2010-01-21

申请号：US12175220

申请日：2008-07-17

申请人： Che-Min Lin ,  Chiao-Min Chen ,  Kuo-Hsiung Wu

发明人： Che-Min Lin ,  Chiao-Min Chen ,  Kuo-Hsiung Wu

IPC分类号： G06F11/00 ,  G06F17/00

CPC分类号： G01R31/3167

摘要： An audio codec and a BIST method adapted for the audio codec are provided. The BIST method includes the following steps. A first channel digital-to-analog converter (DAC) of the audio codec converts a test signal into an analog signal. A first channel analog-to-digital converter (ADC) of the audio codec converts the analog signal into a digital signal. Use a second channel DAC of the audio codec and a second channel ADC of the audio codec to calculate the magnitudes of a plurality of spectral components of the DFT of the digital signal. Determine whether the audio codec passes the test according to the magnitudes of the spectral components.

摘要翻译： 提供了适用于音频编解码器的音频编解码器和BIST方法。 BIST方法包括以下步骤。 音频编解码器的第一通道数/模转换器（DAC）将测试信号转换为模拟信号。 音频编解码器的第一通道模拟 - 数字转换器（ADC）将模拟信号转换为数字信号。 使用音频编解码器的第二通道DAC和音频编解码器的第二通道ADC来计算数字信号的DFT的多个频谱分量的幅度。 确定音频编解码器是否根据频谱分量的大小通过测试。