MONOLITHIC CRYSTAL FILTER - TOVARISCHESTVO S OGRANICHENNOI

Title:

MONOLITHIC CRYSTAL FILTER

Document Type and Number:

WIPO Patent Application WO/1996/034454

Kind Code:

A1

Abstract:

The invention pertains to radioelectronics and can be used for developing a device for frequency-based signal selection. The invention in essence lies in the fact that the filter contains a piezoelectric disc (1) made of lanthanum-gallium silicate, two pairs of overlapping exciter electrodes (2, 3 and 4, 5), and outputs (6). In the device in question, ratios of electrode length in the direction of the acoustic link axis, electrode surface area and disc thickness were experimentally selected to permit broadening of the frequency range towards the higher frequencies. The proposed filter design enhances the temperature stability of the mean filter frequency through a wide range of positive temperatures while also reducing the level of secondary frequency bands which pass through.

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Inventors:

SAKHAROV SERGEI ALEXANDROVICH (RU)
MEDVEDEV ANDREI VALERIEVICH (RU)
PISAREVSKY YURY VLADIMIROVICH (RU)
LITVINOV VALENTIN PETROVICH (RU)

Application Number:

PCT/RU1996/000044

Publication Date:

October 31, 1996

Filing Date:

March 01, 1996

Export Citation:

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Assignee:

TOVARISCHESTVO S OGRANICHENNOI (RU)
SAKHAROV SERGEI ALEXANDROVICH (RU)
MEDVEDEV ANDREI VALERIEVICH (RU)
PISAREVSKY YURY VLADIMIROVICH (RU)
LITVINOV VALENTIN PETROVICH (RU)

International Classes:

H03H9/17; H01L41/08; H03H9/56; (IPC1-7): H03H9/205; H03H9/56

Foreign References:

SU997231A1	1983-02-15
SU1780147A
FR1523518A	1968-05-03
US4542355A	1985-09-17
EP0516400A1	1992-12-02

Other References: