Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Patent
1997-09-25
1999-02-23
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
331135, 333193, H03B 532
Patent
active
058748660
ABSTRACT:
An oscillation circuit of phase-shift type includes a surface acoustic wave filter in a feedback circuit, the surface acoustic wave filter having first and second one-port surface acoustic wave resonators of different resonance frequencies connected in a ladder configuration. The oscillation circuit has a high C/N ratio with a large bandwidth of variable frequency and can be fabricated in a small size with low costs.
REFERENCES:
patent: 4325032 (1982-04-01), Gilden
patent: 5654680 (1997-08-01), Kwan et al.
patent: 5719537 (1998-02-01), Matsui et al.
Avramov Ivan Dimitrov
Ikata Osamu
Matsuda Takashi
Satoh Yoshio
Takahashi Yoshitaka
Fujitsu Limited
Fujitsu Towa Electron Limited
Grimm Siegfried H.
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