Oscillators – With distributed parameter resonator
Patent
1988-11-25
1989-12-12
Mis, David
Oscillators
With distributed parameter resonator
331 34, 331117D, 331176, 331177R, 375120, 455264, H03B 504, H03B 518, H03L 102, H03L 716
Patent
active
048870528
ABSTRACT:
A tuned oscillator utilizing a thin film ferromagnetic resonator is disclosed. The oscillator comprises an active element for oscillator and a YIG thin film resonator connected to the active element as a part of feed-back circuit for the active element. The YIG thin film resonator is applied with a bias magnetic field perpendicular to a surfce of a YIG disk which is generated by a permanent magnet for a fixed component and a coil for a variable component for the resonance frequency. The resonance frequency is stabilized by use of a PLL circuit connected to an output of the oscillator and feeding back to the coil. Since the YIG thin film tuned oscillator has a high Q value, high quality communication signal processing can be achieved. The YIG tuned oscillator is used as local oscillator for a transciever.
REFERENCES:
patent: 4626800 (1986-12-01), Murakami et al.
patent: 4704739 (1987-11-01), Murakami et al.
patent: 4745380 (1988-05-01), Murakami et al.
patent: 4746884 (1988-05-01), Murakami et al.
Mizunuma Yasuyuki
Murakami Yoshikazu
Nakano Hiroyuki
Niikura Kanako
Ohgihara Takahiro
Mis David
Sony Corporation
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