Apparatus and method of automatic gain control in a receiver

Details Apparatus and method of automatic gain control in a receiver Apparatus and method of automatic gain control in a receiver

H - Electricity

04

B

H04B 1/16 (2006.01) H03G 1/00 (2006.01) H03G 3/20 (2006.01) H04B 1/30 (2006.01) H04L 27/22 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2077440

A radio receiver (107) including at least two amplifier (245, 247, 207) stages each having adjustable gain. The receiver (107) generates a first and a second control signal (267, 229) In absence of receiving an input signal, the receiver (107) adjusts the gain of at least the first of the at least two amplifier stages (207) with said first control signal (229). Upon generation of the second control signal (267) the gain of the first of the at least two amplifiers stages (207) is maintained at a constant level. The gain of a second of the at least two amplifier stages (247) is adjusted with said first control signal (229), producing an output signal (269). A predetermined amplitude of the output signal (269) is maintained while receiving an input signal.

Un récepteur radio (107) comprenant au moins deux étages amplificateurs (245, 247, 207) chacun ayant un gain réglable. Le récepteur (107) émet un premier et un second signal de commande (267, 229). En cas de non-réception d'un signal d'entrée, le récepteur (107) règle le gain d'au moins le premier d'au moins deux étages amplificateurs (207) avec ce même premier signal de commande (229). Dès l'émission du second signal de commande (267) le gain du premier d'au moins deux étages amplificateurs (207) est maintenu à un niveau constant. Le gain du second d'au moins deux étages amplificateurs (247) est réglé avec ce même premier signal de commande (229), ce qui produit un signal de sortie (269). Une amplitude préétablie du signal de sortie (269) est maintenue pendant la réception d'un signal d'entrée.

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