Frequency synthesizer

H - Electricity – 03 – L

Patent

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Details

H03L 7/18 (2006.01) H04B 1/04 (2006.01)

Patent

CA 2156269

A phase comparator (91) makes a phase comparison between a frequency-divided signal from a frequency divider (98) and a reference oscillation signal from a reference signal oscillator (90). The phase error signal obtained from the comparison is passed through an LPF (92) to yield a frequency control signal, which is applied to a VCO (94). An oscillated signal from is frequency-multiplied by a frequency multiplier (96). The multiplied output oscillation signal SO is frequency-divided by the frequency divider (98) and output to the phase comparator (91). The multiplied output oscillation signal SO is sent out to a receiver circuit (43) and a transmitter circuit (45).

Un comparateur de phases (91) compare la phase d'un signal de références provenant d'un oscillateur (90) produisant un signal de références avec la phase d'un signal d'un diviseur de fréquences (98). Le signal d'erreur de phase provenant du comparateur est acheminé par un filtre passe-bas (92) pour obtenir un signal de commande à appliquer à un oscillateur commandé en tension (94). Le signal provenant de l'oscillateur commandé en tension (94) est multiplié par un multplicateur (96). En outre, le signal de sortie multiplié SO est soumis à une division de fréquences par le diviseur de fréquences (98) avant d'être communiqué au comparateur de phases (91). Le signal de sortie multiplié (50) est envoyé à un circuit de réception (43) et à un circuit d'émission (45).

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