Three terminal surface acoustic wave (SAW) device

Details Three terminal surface acoustic wave (SAW) device Three terminal surface acoustic wave (SAW) device

1995-07-28

1996-12-17

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333195, 310313R, 310313B, H03H 964

Patent

active

055857701

ABSTRACT:
A three-terminal resonator device (200) resonant at a resonant frequency has a first terminal (201), a second terminal (202), and a common terminal (203). The resonator includes a surface acoustic wave transducer (290) disposed on a piezoelectric substrate (201). The SAW transducer (290) is comprised of a first sub-transducer (210) and a second sub-transducer (220) which respectively include a first set of electrodes (211,213) and a second set of electrodes (221,223). One of the electrodes of each of the first set and the second set of electrodes respectively provide the first terminal (201) and the second terminal (203). The other terminals of the first and second set of electrodes are connected at the common terminal (203) to provide a serial connection between the first sub-transducer (210), and the second sub-transducer (220).

REFERENCES:
patent: 3600710 (1971-08-01), Adler
patent: 3675054 (1972-07-01), Jones et al.
patent: 3868608 (1975-02-01), Williams
patent: 4223284 (1980-09-01), Inoue et al.
patent: 4384264 (1983-05-01), Kadota
patent: 4571519 (1986-02-01), Kawabata et al.
patent: 5093638 (1992-03-01), Kinsman et al.
patent: 5184042 (1993-02-01), Kadota et al.
"Saw If Filter on LitaO.sub.3 For Color TV Receivers" IEEE Transactions on Consumer Electronics vol CE-24, No. 3 Aug. 78 pp. 337-348.

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