Saw device and method of manufacture

Details Saw device and method of manufacture Saw device and method of manufacture

1993-11-08

1995-05-16

Pascal, Robert J.

Oscillators

Solid state active element oscillator

Significant distributed parameter resonator

310313R, 333194, 333195, H01L 4104, H03B 532

Patent

active

054164478

ABSTRACT:
A SAW oscillator circuit including a housing having disposed therein a surface wave propagation supporting substrate with a pair of transducers coupled by surface waves propagating through the substrate and electronic circuitry connected to the pair of transducers and arranged to provide, with the connected resonator, the SAW oscillator circuit. A weight is attached to the resonator. The housing is susceptible of vibratory deflections which induce vibratory deflections in the substrate and the weight suppresses the vibratory deflections induced in the substrate of the resonator. With such arrangement, while sufficiently thick externally mounted stiffeners are not used because of space limitations, the effects of vibratory deflections induced in the substrate of the insufficiently thick, or un-stiffened housing are compensated by the weight attached to the resonator.

REFERENCES:
patent: 4194171 (1980-03-01), Jelks
patent: 4270105 (1981-05-01), Parker et al.
patent: 4409570 (1983-10-01), Tanski
patent: 4639697 (1987-01-01), Yarranton et al.
patent: 4933588 (1990-06-01), Greer
patent: 5208504 (1993-05-01), Parker et al.
H. F. Tiersten et al., "An Analysis of the Normal Acceleration Sensitivity of ST-Cut Quartz Surface Wave Resonators Rigidly Supported Along the Edges", 41st Annual Frequency Control Symp.-1987, IEEE, pp. 282-288.
J. A. Greer et al., "Improved Vibration Sensitivity of the All Quartz Package Surface Acoustic Wave Resonator", 42nd Annual Frequency Control Symp.-1988, IEEE, pp. 239-251.
T. E. Parker et al., "SAW Oscillators With Low Vibration Sensitivity", 45th Annual Symp. on Freq. Control, 1991 IEEE, pp. 321-329.

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