Multimode fast attack automatic gain control (agc) loop for...

Details Multimode fast attack automatic gain control (agc) loop for... Multimode fast attack automatic gain control (agc) loop for...

H - Electricity

03

G

H03G 3/20 (2006.01) H03G 3/30 (2006.01) H04B 1/40 (2006.01)

Patent

CA 2370744

A multimode fast attack automatic gain control (AGC) circuit (100) includes an analog feedback loop and a digital feedback loop. The analog feedback loop is switched into the amplifier stage (102) by a first switch (126) when dynamic control of the gain attenuation is desired. The digital feedback loop is switched into the amplifier stage when attenuation is to be adjusted periodically, such as between sequentially received time slots in a time division multiple access (TDMA) mode of communication.

L'invention concerne un circuit de contrôle de gain automatique (AGC) à attaque rapide multimode (100) comportant une boucle de réaction analogique et une boucle de réaction numérique. La boucle de réaction analogique est commutée en étage d'amplification (102) par un premier commutateur (126), lorsque l'on souhaite contrôler dynamiquement l'atténuation de gain. La boucle de réaction numérique est commutée en étage d'amplification, lorsque l'atténuation doit être réglée périodiquement, comme c'est le cas entre des créneaux temporels reçus en séquences dans un mode de communication à accès multiple par répartition dans le temps (TDMA).

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