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Machine translation
1. (WO1981002714) SELECTION STAGE OF THE AC SIGNAL HAVING THE GREATER AMPLITUDE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002714    International Application No.:    PCT/FR1981/000039
Publication Date: 01.10.1981 International Filing Date: 17.03.1981
IPC:
B61L 3/24 (2006.01), G01R 23/00 (2006.01), H04L 27/156 (2006.01)
Applicants:
Inventors:
Priority Data:
8005981 18.03.1980 FR
Title (EN) SELECTION STAGE OF THE AC SIGNAL HAVING THE GREATER AMPLITUDE
(FR) ETAGE DE SELECTION DU SIGNAL ALTERNATIF DE PLUS GRANDE AMPLITUDE PARMI DEUX SIGNAUX DE FREQUENCES DIFFERENTES
Abstract: front page image
(EN)Between two signals having different frequencies the selection stage can be used especially within the information transmission devices concerning the railway circulation on a track along which a plurality of transmission areas follow one another with alternative carrier frequencies, in order to avoid cross talk problems between adjacent areas. According to the invention the selection stage comprises an operational amplifier (6) disposed in an open loop, a counter (5) of the number of crenels contained in the output signal of the differential amplifier (6) and a circuit (4) for controlling the switching of an inverter connecting to the input of the processing device (2) of the greater amplitude signal the appropriate filter in order to eliminate the lesser amplitude signal. Railway application.
(FR)L"etage de selection trouve son application notamment dans les dispositifs de transmission d"informations pour la circulation ferroviaire sur une voie le long de laquelle une pluralite de zones de transmission se succedent avec des frequences porteuses en alternat, en vue d"eviter les problemes de diaphonie entre des zones adjacentes. Selon l"invention l"etage de selection comprend un amplificateur operationnel (6) dispose en boucle ouverte, un compteur (5) du nombre de creneaux que comporte le signal de sortie de l"amplificateur differentiel (6) et un circuit de commande (4) du basculement d"un inverseur connectant a l"entree du dispositif de traitement (2) du signal de plus grande amplitude le filtre approprie pour eliminer le signal de plus faible amplitude. Application ferroviaire.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)