发明名称 |
Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator |
摘要 |
The present invention relates to an apparatus and a method for sigma-delta modulation with a reduced periodic noise (idle noise) in a sigma-delta modulator. The reduction is achieved by means of addition of two different Dither signals (217,218) to the sigma-delta modulator. A first Dither signal (218) is constituted by a particular bit pattern of a certain period while a second Dither signal (217) is constituted by a pseudo-random signal of a certain other period. |
申请公布号 |
SE509408(C2) |
申请公布日期 |
1999.01.25 |
申请号 |
SE19970001986 |
申请日期 |
1997.05.27 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
MATS *FRAENNHAGEN;PER HENRIK *FREMROT |
分类号 |
H03M3/02;H03M7/00;(IPC1-7):H03M3/02 |
主分类号 |
H03M3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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