Voltage-controlled oscillator having a bandpass filter

Details Voltage-controlled oscillator having a bandpass filter Voltage-controlled oscillator having a bandpass filter

2006-01-31

2006-01-31

Kinkead, Arnold (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S074000, C331S1170FE, C331S1170FE, C331S1160FE, C331S1160FE, C331S167000, C331S03600C

Reexamination Certificate

active

06992535

ABSTRACT:
A voltage-controlled oscillator (VCO) having a bandpass filter includes an oscillation circuit and a bandpass filter. The oscillation circuit outputs a first oscillation frequency with a harmonic distortion according to a tuning voltage. The first oscillation frequency is then input to the bandpass filter and the harmonic distortion of the first oscillation frequency is filtered. Therefore, a second oscillation frequency without the harmonic distortion is output from the bandpass filter. The invention is characterized by that the bandpass filter that removes the harmonic distortion from the VCO.

REFERENCES:
patent: 4023108 (1977-05-01), Torii
patent: 6549083 (2003-04-01), Kanazawa et al.

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