Devices using piezoelectric Ti.sub.3 BX.sub.4 compounds

Details Devices using piezoelectric Ti.sub.3 BX.sub.4 compounds Devices using piezoelectric Ti.sub.3 BX.sub.4 compounds

1975-01-10

1976-08-03

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

310 8, 310 82, 333 72, 333 30R, H01L 4118

Patent

active

039731499

ABSTRACT:
A crystal resonator is disclosed of a single crystal of the approximate composition Tl.sub.3 BX.sub.4 having two parallel surfaces normal to a zero temperature coefficient of frequency direction and having an electrode mounted on each surface, where B is vanadium, niobium, or tantalum, and X is sulfur or selenium. A filter is disclosed of a crystal resonator coupled to a capacitor or more than one crystal resonator in series each coupled to a capacitor. A voltage controlled crystal oscillator resonator is disclosed of a crystal resonator in parallel with an inductor and a varactor.

REFERENCES:
patent: 3771072 (1973-11-01), Slobodnik, Jr.
patent: 3772618 (1973-11-01), Slobodnik, Jr.

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