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Machine translation
1. (WO1981002353) DIGITAL PSEUDO CONTINUOUS TONE DETECTOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002353    International Application No.:    PCT/US1981/000028
Publication Date: 20.08.1981 International Filing Date: 08.01.1981
IPC:
H03H 17/00 (2006.01), G06F 17/10 (2006.01), G06F 17/15 (2006.01), H03D 3/00 (2006.01), H03G 3/00 (2006.01), H04W 88/02 (2009.01)
Applicants:
Inventors:
Priority Data:
121563 14.02.1980 US
Title (EN) DIGITAL PSEUDO CONTINUOUS TONE DETECTOR
(FR) DETECTEUR DE TONALITE NUMERIQUE PSEUDO CONTINU
Abstract: front page image
(EN)Method and apparatus (Fig. 1) for sampling input signals (20) of different frequencies and providing a detect signal when the input frequency has a predetermined value suitable for use as a tone decoder for continuous tone controlled squelch systems. The method utilizes digital pseudo continuous correlation tone detection, and includes sample matrix limiting (26 and 28) to provide rapid reverse burst turnoff, as well as background detection to avoid adjacent channel reverse burst turnoff falsing.
(FR)Procede et dispositif d'echantillonnage de signaux d'entree (20) de differentes frequences et produisant un signal de detection lorsque la frequence du signal d'entree a une valeur predeterminee, convenant a l'utilisation en tant que decodeur de tonalite pour des systemes de blocage automatique continu commandes par la tonalite. Ce procede utilise un dispositif digital pseudo-continu de detection de tonalite de correlation, et comprend un limiteur matriciel d'echantillons (26 et 28) permettant un blocage rapide de la salve inversee ainsi qu'une detection de l'arriere plan de maniere a eviter toute inexactitude dans le blocage de la salve inversee d'un canal adjacent.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)