Feedback oscillator circuit using a saw resonator filter

Details Feedback oscillator circuit using a saw resonator filter Feedback oscillator circuit using a saw resonator filter

H - Electricity

03

B

H03B 5/30 (2006.01) H03B 5/32 (2006.01)

Patent

CA 2196120

A crystal-controlled oscillator circuit is modified by the present invention by replacing the crystal with the first signal port of a two-port SAW resonator filter that has a low-loss primarily inductive characteristic and taking the oscillation output from the other port of the filter to provide an oscillator frequency with harmonics that are reduced significantly when compared to the output of a crystal-controlled oscillator.

La présente invention est une modification d'un circuit oscillant piloté par cristal qui consiste à remplacer le cristal par le premier port de signaux d'un filtre résonant à deux ports pour ondes acoustiques de surface à caractéristique à prépondérance inductive à faible perte et à utiliser les oscillations de sortie de l'autre port du filtre pour obtenir une fréquence d'oscillation à harmoniques sensiblement atténuées par rapport à celles du signal de sortie d'un oscillateur piloté par cristal.

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