Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1992-08-21
1994-07-19
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313C, H01L 4108
Patent
active
053312473
ABSTRACT:
In an interdigital electrode of a surface acoustic wave device having nonexciting portions formed by removing fingers, fingers having an excitation source located nearest to a nonexciting portion in between are so positioned as to approach the nonexciting portion as compared with arrangement pitch of other fingers. Fingers having an excitation source located nearest to an end of the electrode in between are so positioned as to approach the end of the interdigital electrode as compared with arrangement pitch of other fingers. Fingers having an excitation source located in the central portion of the electrode group in between are so positioned as to approach each other as compared with arrangement pitch of other fingers.
REFERENCES:
patent: 3675054 (1972-07-01), Jones
patent: 4464597 (1984-08-01), Setsune
patent: 4701657 (1987-10-01), Grassl
patent: 4728912 (1988-03-01), Yuhara et al.
patent: 4774482 (1988-09-01), Fleischmann
patent: 4918349 (1990-04-01), Shiba et al.
patent: 5021699 (1991-06-01), Dufilie
patent: 5162689 (1992-11-01), Fliegel et al.
patent: 5175519 (1992-12-01), Yatsuda et al.
Hikino Osamu
Ikeda Hiroaki
Shiba Takashi
Budd Mark O.
Hitachi , Ltd.
LandOfFree
Surface acoustic wave device and communication device using the does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface acoustic wave device and communication device using the , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave device and communication device using the will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-522454