公开(公告)号：US06657572B2

公开(公告)日：2003-12-02

申请号：US10069340

申请日：2002-05-07

申请人： Ducksoo Lee ,  Yeongha Choi ,  Sejin Doo ,  Kyoungsoo Park ,  Koeng-Mo Sung

发明人： Ducksoo Lee ,  Yeongha Choi ,  Sejin Doo ,  Kyoungsoo Park ,  Koeng-Mo Sung

IPC分类号： H03M300

CPC分类号： H03M7/3042 ,  H03M7/3028

摘要： A digital noise-shaping filter with real coefficients for delta-sigma data converters used in a digital amplifier, 1-bit digital/analog converter, 1-bit analog/digital converter and the like, and a method for making the same. The present digital noise-shaping filter has improved noise suppression performance and system stability and reduced calculation complexity. To this end, the digital noise-shaping filter comprises a noise transfer function expressed by NTF(z)=−1+a1z−1+a2z−2+&Lgr;+aNz−N. The noise transfer function has optimum real coefficients or real coefficients approximating them.

摘要翻译： 用于数字放大器，1位数/模转换器，1位模拟/数字转换器等的用于Δ-Σ数据转换器的实系数的数字噪声整形滤波器及其制造方法。 目前的数字噪声整形滤波器具有改善的噪声抑制性能和系统稳定性，降低了计算复杂度。 为此，数字噪声整形滤波器包括由NTF（z）= - 1 + a1z -1 + a2z + 2 + Lambda + aNz <-N>表示的噪声传递函数。 噪声传递函数具有最佳实数系数或逼近它们的实数。