Voltage controlled oscillator comprising an injection...

Details Voltage controlled oscillator comprising an injection... Voltage controlled oscillator comprising an injection...

2008-05-13

2008-05-13

Lee, Benny (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S010000, C331S023000, C327S156000, C332S127000

Reexamination Certificate

active

07372337

ABSTRACT:
The present invention relates to a method for stabilising the operation of a voltage controlled oscillator driven by a phase locked loop, the voltage controlled oscillator delivering an RF signal and receiving through at least one spurious path a harmonic component of a frequency equal or proximate to that of the RF signal, capable of disturbing its operation by injection pulling. According to the present invention, the method comprises a step of injecting into the voltage controlled oscillator an injection pulling compensation signal, the phase and the amplitude of which are adjusted so as to neutralise the effects of the spurious harmonic component. Application particularly to phase modulation IQ circuits in radiotelephony.

REFERENCES:
patent: 5144260 (1992-09-01), Stribling et al.
patent: 6016082 (2000-01-01), Cruz et al.
patent: 6281758 (2001-08-01), Elsayed et al.
patent: 6321074 (2001-11-01), Lemay
patent: 6424230 (2002-07-01), Kocaman et al.

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