发明名称 |
Level regulator of the digital type |
摘要 |
The invention concerns a level regulator for a frequency division multiplex group, having a variable gain network controlled basically by the observing of the amplitude of a pilot wave contained in the multiplex group, comprising a digital filter preceded by a sampling device and an analog-digital converter for extracting the pilot wave from the multiplex group downstream from the variable gain network, a calculation circuit connected to the digital filter for determining a number which is a function of the level, over a predetermined interval of time, of the pilot wave at the output of the filter, and a digital comparison element which compares that number with a reference value with a view to generating a control signal for the said network. In a particular embodiment of the invention, the multiplex group is transposed towards the low frequencies before being digitally processed.
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申请公布号 |
US4009350(A) |
申请公布日期 |
1977.02.22 |
申请号 |
US19750620134 |
申请日期 |
1975.10.06 |
申请人 |
COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL |
发明人 |
CABET, ALAIN;PINIER, GASTON;SEMUR, PIERRE;ROY, MARIE-ANNICK |
分类号 |
H04B3/10;(IPC1-7):H04J1/16 |
主分类号 |
H04B3/10 |
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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