Differential input/output surface acoustic wave device with prox

Details Differential input/output surface acoustic wave device with prox Differential input/output surface acoustic wave device with prox

1998-04-09

1999-08-10

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333195, 310313B, 310313D, H03H 964

Patent

active

059364874

ABSTRACT:
The disclosure relates to differential input/output surface acoustic wave devices with proximity coupling. The disclosed device comprises a whole number N of acoustic channels, where N is at least equal to two. The acoustic channels are coupled together by proximity. A first acoustic channel comprises at least one transducer separated into several parts electrically connected in parallel with one another to form a first differential port (E+) and a second differential port (E-). The polarities of the different parts of the transducer are chosen so that the first differential port (E+) and the second differential port (E-) are electrically symmetrical. Application in particular to surface acoustic wave filters for portable telephones.

REFERENCES:
patent: 5020034 (1991-05-01), Solal et al.
patent: 5021699 (1991-06-01), Dufilie
patent: 5264751 (1993-11-01), Dufilie et al.
patent: 5307035 (1994-04-01), Dufilie et al.
patent: 5357228 (1994-10-01), Dufilie
patent: 5365138 (1994-11-01), Saw et al.
patent: 5475348 (1995-12-01), Hode et al.
patent: 5550793 (1996-08-01), Dufilie
patent: 5581141 (1996-12-01), Yamada et al.
patent: 5703427 (1997-12-01), Solal et al.
patent: 5790000 (1998-08-01), Dai et al.
patent: 5793266 (1998-08-01), Allen et al.
B. Wall, A. du Hamel; "Balanced Driven Transversely Coupled Waveguide Resonator Filters", IEEE Ultrasonics Symposium 1996, vol. 1, pp. 47-51; Nov. 3-6, 1996, San Antonio, Tx, USA.

Affiliated with

Also associated with

Rating

Differential input/output surface acoustic wave device with prox does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differential input/output surface acoustic wave device with prox, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential input/output surface acoustic wave device with prox will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1123933