Apparatus and method of oscillating wideband frequency

Details Apparatus and method of oscillating wideband frequency Apparatus and method of oscillating wideband frequency

H - Electricity

03

L

H03L 7/08 (2006.01)

Patent

CA 2580945

An apparatus for oscillating a frequency, which comprises a phase lock loop, see fig. 5, a variable frequency divider() is shown, that divides a first frequency (Fout) signal by a division ratio to generate a second frequency signal, this based on a comparison of reference frequency clock input (Fref) and feedback input to phase/frequency detector (510). A charge pump (520) and loop filter (530) are shown with a divider (550) that divides the second frequency signal (355) to allow the correct feedback frequency to be realized. The VCO (540) inherently has a resonant circuit including the capacitors to be selected and a corresponding control voltage to set the frequency of operation as well as an active circuit (320) for proper gain.

La présente invention a trait à un appareil et un procédé d'oscillation d'une fréquence à bande large. L'appareil comporte: une unité d'oscillation de fréquence pour l'oscillation d'une fréquence prédéterminée; une boucle à phase asservie pour la comparaison de la fréquence oscillée et une fréquence de référence par la rétroaction de la fréquence oscillée provenant de l'unité d'oscillation de fréquence et la fixation d'une fréquence d'oscillation de l'unité d'oscillation de fréquence; et une unité de division variable pour la variation d'un rapport de division pour se rapprocher de la bande de fréquence requise par la fréquence d'oscillation et la division de la fréquence d'oscillation.

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