公开(公告)号：US06870494B1

公开(公告)日：2005-03-22

申请号：US10676950

申请日：2003-10-01

申请人： Eric Cheng ,  Wen-Lung Shieh ,  Chih-Hung Tseng ,  Hipolk Lu

发明人： Eric Cheng ,  Wen-Lung Shieh ,  Chih-Hung Tseng ,  Hipolk Lu

IPC分类号： H03M3/00 ,  H03M1/66

CPC分类号： H03M3/50

摘要： System of multi-channel shared resistor-string digital-to-analog converters comprises a time-sharing interpolator converting the multi-channel digital audio input at low sample rate to the multi-channel digital audio output at high sample rate, a time-sharing sigma-delta modulator modulating the multi-channel digital audio input with a long sample wordlength from the interpolator to be a multi-channel digital audio output with a shorter sample wordlength, multi-channel shared resistor-string digital-to-analog converters converting the multi-channel digital audio input to be a multi-channel staircase analog signal output, and one low-order RC filter for each channel further attenuating the out-of-band noise in the analog staircase analog output, especially the high-frequency residue images.

摘要翻译： 多通道共享电阻串数模转换器的系统包括一个分时内插器，以低采样率将多通道数字音频输入转换为高采样率的多通道数字音频输出，分时 Σ-Δ调制器将来自内插器的长采样字长的多通道数字音频输入调制成具有较短采样字长度的多通道数字音频输出，多通道共享电阻串数模转换器将 多通道数字音频输入为多通道阶梯模拟信号输出，每个通道一个低阶RC滤波器进一步衰减模拟阶梯模拟输出中的带外噪声，特别是高频残留图像 。

公开(公告)号：US20050073453A1

公开(公告)日：2005-04-07

申请号：US10676950

申请日：2003-10-01

申请人： Eric Cheng ,  Wen-Lung Shieh ,  Chih-Hung Tseng ,  Hipolk Lu

发明人： Eric Cheng ,  Wen-Lung Shieh ,  Chih-Hung Tseng ,  Hipolk Lu

IPC分类号： H03M3/00 ,  H03M1/78

CPC分类号： H03M3/50

摘要： System of multi-channel shared resistor-string digital-to-analog converters comprises a time-sharing interpolator converting the multi-channel digital audio input at low sample rate to the multi-channel digital audio output at high sample rate, a time-sharing sigma-delta modulator modulating the multi-channel digital audio input with a long sample wordlength from the interpolator to be a multi-channel digital audio output with a shorter sample wordlength, multi-channel shared resistor-string digital-to-analog converters converting the multi-channel digital audio input to be a multi-channel staircase analog signal output, and one low-order RC filter for each channel further attenuating the out-of-band noise in the analog staircase analog output, especially the high-frequency residue images.

摘要翻译： 多通道共享电阻串数模转换器的系统包括一个分时内插器，以低采样率将多通道数字音频输入转换为高采样率的多通道数字音频输出，分时 Σ-Δ调制器将来自内插器的长采样字长的多通道数字音频输入调制成具有较短采样字长度的多通道数字音频输出，多通道共享电阻串数模转换器将 多通道数字音频输入为多通道阶梯模拟信号输出，每个通道一个低阶RC滤波器进一步衰减模拟阶梯模拟输出中的带外噪声，特别是高频残留图像 。