Radio having a combined pll and afc loop and method of...

H - Electricity – 04 – B

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H04B 1/16 (2006.01) H03J 7/06 (2006.01) H04B 1/40 (2006.01)

Patent

CA 2118810

A radio (100) having a combined phase locked loop (PLL) (207) and an automatic frequency control (AFC) loop (215, 109, 111) and method of operating the same. A mixer (201) converts the received RF signal (117) to an intermediate frequency (IF) signal (219) responsive to an injection signal (217). The PLL (207) locks the injection signal (217) to the received RF signal (117) responsive to a reference signal (119). The AFC loop (215, 109, 111) locks the reference signal (119) to the received RF signal (117) responsive to the injection signal (217).

L'invention décrit une radio (100) ayant une boucle à verrouillage de phase (207) et une boucle à régulation de fréquence automatique (215, 109, 111) combinées et le procédé pour son fonctionnement. Un mélangeur (201) convertit le signal RF reçu (117) en un signal avec une fréquence intermédiaire (219) en réponse à un signal d'injection (217). La boucle à verrouillage de phase (207) verrouille le signal d'injection (217) avec le signal RF reçu (117) en réponse à un signal de référence (119). La boucle à régulation de fréquence automatique (215, 109, 111) verrouille le signal de référence (119) avec le signal RF reçu (117) en réponse au signal d'injection (217).

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