发明授权
- 专利标题： Method and apparatus for carrier regeneration and synchronous amplitude demodulation
- 专利标题（中）： 载波再生和同步幅度解调的方法和装置
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申请号： US68439申请日： 1979-08-21
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公开(公告)号： US4292594A公开(公告)日： 1981-09-29
- 发明人: Jacques David , Hubert Mionet
- 申请人： Jacques David , Hubert Mionet
- 申请人地址： FRX Paris
- 专利权人： Compagnie Industrielle des Telecommunications Cit-Alcatel
- 当前专利权人： Compagnie Industrielle des Telecommunications Cit-Alcatel
- 当前专利权人地址： FRX Paris
- 优先权： FRX7824994 19780830
- 主分类号： H03D1/24
- IPC分类号： H03D1/24 ; H03J7/06 ; H03L7/06 ; H04B1/30 ; H03D1/00
摘要：
The invention relates to a method of regenerating the modulation carrier wave of an original modulated signal (SL) which has symmetrical frequency components about the carrier. A phase discriminator (D1) which receives two image signals (SL, S11) of the original signal controls the frequency of a local oscillator (OL), the frequency spectrum of one of the image signals being inverted with respect to that of the original signal and the difference in frequencies between these two image signals being twice that between the local carrier and the carrier of the original signal. Application to the synchronous demodulation of a television signal.
公开/授权文献
- USD389420S Traffic master light wand 公开/授权日：1998-01-20
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