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EP0689366A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Telephonic tone detection circuit

Assignee: STMicroelectronics SA
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Filing: 1995-05-23
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Granted: —
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Expires: 2015-05-23
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Abstract

Abstract Translated from French La présente invention concerne un circuit de détection de signaux d'identification dans un signal numérique d'entrée (Rx), comprenant : un ensemble de modules de traitement (50, 52) interconnectés de manière librement programmable ; une mémoire de signal (54) mise à jour à la fréquence d'échantillonnage du signal d'entrée, contenant les valeurs des signaux de sortie des modules de traitement et du signal d'entrée à des adresses associées ; une mémoire de programmation (56, 58) contenant, à des emplacements associés aux entrées des modules de traitement, les adresses de la mémoire de signal associées aux signaux que l'on désire connecter auxdites entrées ; et des moyens de commande (64) pour lire les adresses stockées dans la mémoire de programmation, lire les valeurs se trouvant à ces adresses dans la mémoire de signal, et fournir ces valeurs lues aux entrées des modules de traitement. The present invention relates to a circuit for detecting identification signals in a digital input signal (Rx), comprising: a set of freely programmable interconnected processing modules (50, 52); a signal memory (54) updated at the sampling frequency of the input signal, containing the values of the output signals of the processing modules and of the input signal at associated addresses; a programming memory (56, 58) containing, at locations associated with the inputs of the processing modules, the addresses of the signal memory associated with the signals that it is desired to connect to said inputs; and control means (64) for reading the addresses stored in the programming memory, reading the values located at these addresses in the signal memory, and supplying these read values to the inputs of the processing modules.

Inventors

  • 👤 François Druilhe

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 17:35
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/457

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

WO1981001623A1 Cited
EP0216488A2 Cited
US4709344A Cited

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