发明名称 |
DELTA-SIGMA MODULATOR AND DITHERING METHOD INCLUDING A DITHERING CAPABILITY FOR ELIMINATING IDLE TONES |
摘要 |
<p>A delta-sigma modulator (100) including a dithering capability for eliminating idle tones is provided according to the invention. The delta-sigma modulator (100) includes a bitstream converter (107) configured to generate a digital signal output substantially corresponding to an analog signal input, a periodicity detector (111) coupled to the bitstream converter (107) and config-ured to detect periodicity in the digital signal output, and a dithering sequence generator (116) connected to and activated by the periodicity detector (111). The dithering sequence generator (116) generates a dithering sequence. The delta-sigma modulator (100) further includes a pulse-width modulation (PWM) generator (119) coupled to the dithering sequence generator (116) and receiving the dithering sequence. The PWM generator (119) modulates the dithering sequence onto the analog signal input of the delta-sigma modulator (100) as a dithering signal.</p> |
申请公布号 |
CA2731566(C) |
申请公布日期 |
2015.04.21 |
申请号 |
CA20082731566 |
申请日期 |
2008.07.30 |
申请人 |
MICRO MOTION, INC. |
发明人 |
LINDEMANN, STIG;NIELSEN, MADS KOLDING |
分类号 |
H03M3/02 |
主分类号 |
H03M3/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|