Multi-moded acoustic wave oscillator

Details Multi-moded acoustic wave oscillator Multi-moded acoustic wave oscillator

1976-04-08

1978-03-07

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Significant distributed parameter resonator

310366, 331135, 331179, 333 30R, 333 72, H03B 530

Patent

active

040782107

ABSTRACT:
A multi-moded acoustic wave oscillator comprises an amplifier and feedback loop incorporating an acoustic wave delay line which may be a surface acoustic wave delay or bulk acoustic delay. Frequency of oscillation is changed in steps by taking different phased outputs from the delay line. This phase difference is achieved either by spacing surface acoustic wave transducers different distances on a substrate from an input transducer or by phase shift circuitry.

REFERENCES:
patent: 3582540 (1971-06-01), Adler et al.
patent: 3852681 (1974-12-01), Underhill
patent: 3921093 (1975-11-01), Lewis
patent: 3962652 (1976-06-01), Zarin et al.
Morgan et al., "Non-Uniform Interdigital Transducers for Acoustic Surface Waves," NEC Research & Development, No. 28, Jan. 1973, pp. 1-13, (333-30 R).

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