Low noise YIG oscillator based phase locked loop

Details Low noise YIG oscillator based phase locked loop Low noise YIG oscillator based phase locked loop

2006-02-28

2006-02-28

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S011000, C331S025000

Reexamination Certificate

active

07005927

ABSTRACT:
A low phase noise YIG oscillator based phase locked loop couples an output frequency to a delay line discriminator to provide a phase noise feedback signal to a wideband tuning port of the YIG oscillator. A delay line in the delay line oscillator may be implemented with either a resonant circuit or a bandpass filter of sufficient bandwidth so that the output frequency and phase noise sidebands are not attenuated. The resonant circuit may be implemented as a YIG sphere integrated into the YIG oscillator in the same magnetic path as the YIG sphere in the oscillator circuitry.

REFERENCES:
patent: 6188349 (2001-02-01), Spencer et al.

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