发明名称 |
Single point modulator having a PLL circuit |
摘要 |
A single-point modulator (1) has a PLL circuit (2) and a programmable frequency divider (7) whose control connection is connected to a circuit branch for injecting a digital modulation signal (15) which is arranged in the feedback path of the PLL circuit (2). The circuit branch contains a sigma-delta modulator (9) which, in turn, has a digital filter (24) having a transfer function H(z). The noise transfer function NTF(z) of the sigma-delta modulator (9) is given by the function NTF(z)=1-H(z).
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申请公布号 |
US2005025276(A1) |
申请公布日期 |
2005.02.03 |
申请号 |
US20040917101 |
申请日期 |
2004.08.12 |
申请人 |
MARKUS HAMMES, GLUSEPPE LI PUMA AND STEFAN VAN WAASEN TO INFINEON TECHNOLOGIES AG |
发明人 |
HAMMES MARKUS;PUMA GIUSEPPE LI;WAASEN STEFAN VAN |
分类号 |
H03C3/09;H03L7/197;(IPC1-7):H03M7/00 |
主分类号 |
H03C3/09 |
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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