发明名称 |
PHASENGEREGELTE OSZILLATORSCHALTUNG |
摘要 |
<p>Disclosed is a phase-locked loop which comprises a voltage controlled variable frequency oscillator (1), a phase comparator (2) having a cosine characteristic and receiving a reference oscillation as well as that supplied by the oscillator (1), and a low-pass filter (3) connected between the output of the phase comparator (2) and a frequency control input of the oscillator (1). The transfer function of the low-pass filter (3) is switchable between two characteristics depending on the instantaneous phase difference between the reference oscillation and that supplied by the oscillator. The first low-pass filter transfer function is adapted to the phase-locked operation of the loop, while the second transfer function is adapted for frequency capture.</p> |
申请公布号 |
DE2847213(A1) |
申请公布日期 |
1979.05.10 |
申请号 |
DE19782847213 |
申请日期 |
1978.10.30 |
申请人 |
COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL,S.A. |
发明人 |
POINAS,CHRISTIAN |
分类号 |
H03H11/12;H03L7/095;H03L7/107;(IPC1-7):03B3/06 |
主分类号 |
H03H11/12 |
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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