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Machine translation
1. (WO1980001229) PHASE CORRECTION CIRCUIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001229    International Application No.:    PCT/JP1979/000310
Publication Date: 12.06.1980 International Filing Date: 05.12.1979
IPC:
H04L 27/227 (2006.01)
Applicants:
Inventors:
Priority Data:
78/152342 08.12.1978 JP
Title (EN) PHASE CORRECTION CIRCUIT
(FR) CIRCUIT DE CORRECTION DE PHASE
Abstract: front page image
(EN)In the reproduction of carrier waves form PSK signals by means of a tracking filter (12), there are utilized two kinds of filters (21) and (22) which have wide and narrow equivalent noise band widths, respectively, so as to provide two output points (a) and (b) producing different output signals having different equivalent noise band widths. The phase difference between the output signals from the output points (a) and (b) is detected by a phase detector (23). The detected phase error is used to shift the phase of the signals at the output point (a) by means of a phase shifter (24) thereby improving phase skipping characteristics and transient response characteristics. Further, the result of the phase detection is utilized to effect changeover of channels or inversion of phase of demodulation base band signals or both.
(FR)Dans la reproduction d"ondes poreuses provenant de signaux (PSK) au moyen d"un filtre de piste (12), on utilise deux genres de filtres (21 et 22) qui possedent des largeurs de bandes de bruits equivalentes large et etroite, respectivement, de maniere a produire deux points de sortie (a) et (b) produisant des signaux de sortie differents ayant des largeurs de bandes de bruits equivalentes differentes. La difference de phase entre les signaux de sortie provenant des points de sortie (a) et (b) est detectee par un detecteur de phase (23). Le dephasage detecte est utilisee pour decaler la phase des signaux au point de sortie (a) au moyen d"un dephaseur (24) ameliorant ainsi les caracteristiques de phase et les caracteristiques de reponses de transition. En outre, le resultat de la detection de phase est utilise pour effectuer le changement de canaux ou l"inversion de phases de signaux de bandes de base de demodulation ou ces deux operations.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)