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1.发明授权Apparatus for obtaining a carrier frequency shifting at a constant phase angle in frequency modulation 失效用于在频率调制中的恒定相位角处获取载波频移的装置
公开(公告)号：US3508136A
公开(公告)日：1970-04-21
申请号：US3508136D
申请日：1967-10-12
Applicant: ERICSSON TELEFON AB L M
Inventor： DANIELSEN SIGURD PARELI , HAGEN JAN-ERIK , WIDL WALTER HERBERT ERWIN
CPC classification number: H04L27/12
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