H - Electricity – 03 – G
Patent
H - Electricity
03
G
H03G 7/08 (2006.01) H03M 1/18 (2006.01)
Patent
CA 2667164
An automatic gain control circuit including a variable gain amplifier (11) adapted to receive a received signal (R) and to output an amplified signal (A) to an analog to digital converter (20), and a gain controller (12) which is connected to said variable gain amplifier (11) for receiving said amplified signal (A) and for controlling a gain of said variable gain amplifier (11). The gain controller (12) is adapted to determine an occurrence of a threshold event each time the amplified signal (A) has reached a predetermined threshold, decrease the gain of the variable gain amplifier (11) at each occurrence of a threshold event, measure a delay since the last threshold event, increase the gain of the variable gain amplifier (11) if the delay is greater than a delay specified value and if the gain of the variable gain amplifier (11) is not maximum.
L'invention concerne un circuit de commande de gain automatique comprenant un amplificateur (11) à gain variable capable de recevoir un signal reçu (R) et d'émettre un signal amplifié (A) à un convertisseur analogique à numérique (20), et un contrôleur de gain (12) qui est connecté audit amplificateur (11) à gain variable pour recevoir ledit signal amplifié (A) et pour commander un gain dudit amplificateur (11) à gain variable. Le contrôleur de gain (12) peut déterminer une occurrence d'un évènement seuil à chaque fois que le signal amplifié (A) a atteint un seuil prédéterminé, peut diminuer le gain de l'amplificateur (11) à gain variable à chaque occurrence d'un évènement seuil, peut mesurer un retard depuis le dernier évènement seuil, peut augmenter le gain de l'amplificateur (11) à gain variable si le retard est supérieur à une valeur spécifiée de retard et si le gain de l'amplificateur (11) à gain variable n'atteint pas un maximum.
Benhamouda Franck
Ing Ros Kiri
Linotte Jean-Michel
Goudreau Gage Dubuc
Sensitive Object
Tyco Electronics Services Gmbh
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