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Machine translation
1. (WO1981000943) DUPLEX AMPLIFYER PARTICULARLY FOR INTERPHONE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000943    International Application No.:    PCT/EP1980/000105
Publication Date: 02.04.1981 International Filing Date: 26.09.1980
IPC:
H04M 1/60 (2006.01)
Applicants:
Inventors:
Priority Data:
2938948 26.09.1979 DE
Title (EN) DUPLEX AMPLIFYER PARTICULARLY FOR INTERPHONE
(FR) AMPLIFICATEUR DUPLEX EN PARTICULIER POUR INTERPHONE
Abstract: front page image
(EN)Duplex amplifyer particularly for interphone with a transmission channel and a receiving channel connected in common to a dual track communication line for duplex traffic in both directions and in the same frequency band. The output (R; F) of the transmission channel is connected on the communication line (KL) to a point (P; G) at the input of the receiving channel. This is achieved through a resistive network (R15-R21; R100-R103), by means of which an amplitude equalization may be achieved between the signals coming out of the transmission channel and the signal entering the receiving channel. Thus, the corresponding signals cancel each other while useful signals which do not correspond may be fully processed. The receiving and transmitting channels are opened when not in operation and dampened in the low frequencies of the transmitting frequency ranges. During operation, the dampening of the corresponding channel is suppressed.
(FR)Amplificateur duplex en particulier pour interphone avec un canal d"emission et un canal de reception qui sont connectes en commun a une ligne de communication a deux voies pour trafic duplex dans les deux sens et dans la meme bande de frequence. La sortie (R; F) du canal d"emission est reliee sur la ligne de communication (KL) avec un point (P;G) a 1 entree du canal de reception. Ceci est realise a travers un reseau resistif (R15-R21; R100-R103), a l"aide duquel une egalisation d"amplitude peut etre entreprise entre les signaux sortant du canal d"emission et les signaux rentrant dans le canal de reception. Ainsi des signaux qui se correspondent s"annulent mutuellement alors que des signaux utiles qui ne se correspondent pas peuvent etre entierement traites. Les canaux de reception et d"emission sont ouverts au repos et amortis dans les frequences basses des bandes de frequences de transmission. Lors du fonctionnement l"amortissement du canal correspondant est supprime.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)