Surface acoustic wave sensor sensing circuits

Details Surface acoustic wave sensor sensing circuits Surface acoustic wave sensor sensing circuits

1979-09-28

1981-10-13

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

331107A, 333193, 310313R, 73778, G01B 716, H03B 518, H03H 925

Patent

active

042951020

ABSTRACT:
A surface acoustic wave sensor system in which a predetermined level of coupling between two surface acoustic wave arrays is intentionally provided in order to couple radio frequency energy from one into the other and thereby, in cooperative effect with attendant oscillator circuits and a filter, results in the development of a difference frequency which is a function of the sensed condition.

REFERENCES:
patent: 3878477 (1975-04-01), Dias et al.
patent: 3888115 (1975-06-01), Schwartz
patent: 4096740 (1978-06-01), Sallee
patent: 4107626 (1978-08-01), Kiewit

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