Crystals having zero temperature coefficients of delay

Details Crystals having zero temperature coefficients of delay Crystals having zero temperature coefficients of delay

1975-01-10

1976-05-11

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

252 629, 310 95, H03H 930, H01L 4118, B01J 1706

Patent

active

039567184

ABSTRACT:
Crystals or Tl.sub.3 VS.sub.4, Tl.sub.3 VSe.sub.4, Tl.sub.3 NbS.sub.4, Tl.sub.3 NbSe.sub.4, Tl.sub.3 TaS.sub.4, and Tl.sub.3 TaSe.sub.4 are disclosed which have a surface containing of normal to a zero temperature coefficient of delay direction. The crystals are used to transmit acoustic waves in surface and bulk wave devices.

REFERENCES:
patent: 3746866 (1973-07-01), Feichtner et al.
patent: 3818382 (1974-06-01), Holland et al.
cermak, "Width of the Energy Gap of Some Ternary Chalcogenides" in Collection Czechoslov Commun, Vol. 34, 1969, pp. 3605-3609.

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