Phase-shift oscillator having ladder-type saw filter feedback ci

Details Phase-shift oscillator having ladder-type saw filter feedback ci Phase-shift oscillator having ladder-type saw filter feedback ci

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.

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