Feedback oscillator circuit using a saw resonator filter

Oscillators – Solid state active element oscillator – Significant distributed parameter resonator

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331116R, 331116FE, H03B 532

Patent

active

057899908

ABSTRACT:
A crystal-controlled oscillator circuit is modified by the present invention by replacing the crystal with the first signal port of a two-port SAW resonator filter that has a low-loss primarily inductive characteristic and taking the oscillation output from the other port of the filter to provide an oscillator frequency with harmonics that are reduced significantly when compared to the output of a crystal-controlled oscillator.

REFERENCES:
patent: 3739299 (1973-06-01), Adler
patent: 3743968 (1973-07-01), Miyake et al.
patent: 4144507 (1979-03-01), Shreve
patent: 4454488 (1984-06-01), Hartmann
patent: 4616197 (1986-10-01), Wright
patent: 4843349 (1989-06-01), Nugent et al.

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