发明名称 |
DIRECT DIGITAL SYNTHESIS OF PRECISE, STABLE ANGLE MODULATED RF SIGNAL |
摘要 |
An RF modulator that allows precise, stable phase shifts to be obtained. The modulator uses a PLL structure including an auxiliary feedforward path including an adaptive gain amplifier (411) used to inject a modulation signal into the PLL at a point past a loop filter (403). A phase demodulator (419) recovers from the output of the PLL phase information which is compared in a comparator (417) to the phase information of the modulation signal. A resulting error signal is used to control the gain of the adaptive gain amplifier (411). The modulator compensates for variability of the VCO (405) and other components of the PLL.
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申请公布号 |
WO9943080(A9) |
申请公布日期 |
1999.10.28 |
申请号 |
WO1999US03285 |
申请日期 |
1999.02.23 |
申请人 |
TROPIAN, INC.;MCCUNE, EARL, W.;SANDER, WENDELL |
发明人 |
MCCUNE, EARL, W.;SANDER, WENDELL |
分类号 |
H03C3/00;H03B28/00;H03C3/08;H03C3/09;H04L27/20;(IPC1-7):H03C3/08 |
主分类号 |
H03C3/00 |
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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