GB2168869B - A surface acoustic wave ladder transducer - Google Patents

A surface acoustic wave ladder transducer

Info

Publication number: GB2168869B
Authority: GB; United Kingdom
Prior art keywords: acoustic wave; surface acoustic; wave ladder; transducer; ladder transducer
Prior art date: 1984-12-19
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

GB08432074A

Other versions

GB2168869A (en

Inventor

Adrian Nigel Farr

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

General Electric Co PLC

Original Assignee

General Electric Co PLC

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1984-12-19

Filing date

1984-12-19

Publication date

1988-09-14

1984-12-19 Application filed by General Electric Co PLC filed Critical General Electric Co PLC

1984-12-19 Priority to GB08432074A priority Critical patent/GB2168869B/en

1986-06-25 Publication of GB2168869A publication Critical patent/GB2168869A/en

1988-09-14 Application granted granted Critical

1988-09-14 Publication of GB2168869B publication Critical patent/GB2168869B/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14544—Transducers of particular shape or position
- H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/02236—Details of surface skimming bulk wave devices
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14544—Transducers of particular shape or position
- H03H9/14564—Shifted fingers transducers
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6406—Filters characterised by a particular frequency characteristic

Landscapes

Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

GB08432074A 1984-12-19 1984-12-19 A surface acoustic wave ladder transducer Expired GB2168869B (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB08432074A GB2168869B (en)	1984-12-19	1984-12-19	A surface acoustic wave ladder transducer

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB08432074A GB2168869B (en)	1984-12-19	1984-12-19	A surface acoustic wave ladder transducer

Publications (2)

Publication Number	Publication Date
GB2168869A GB2168869A (en)	1986-06-25
GB2168869B true GB2168869B (en)	1988-09-14

Family

ID=10571441

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB08432074A Expired GB2168869B (en)	1984-12-19	1984-12-19	A surface acoustic wave ladder transducer

Country Status (1)

Country	Link
GB (1)	GB2168869B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3750940T2 (en) *	1986-07-29	1995-05-11	Rf Monolithics	Converter.
EP0259628B1 (en) *	1986-08-29	1992-03-04	Siemens Aktiengesellschaft	Transducer for an acoustic wave filter device
US5023605A (en) *	1988-11-25	1991-06-11	Gte Laboratories, Inc.	Patterned transducer apparatus for correcting spurious signals in said devices
GB2259818B (en) *	1991-09-17	1995-08-16	Racal Mesl Ltd	Surface acoustic wave (saw) ladder transducer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1986001655A1 (en) *	1984-09-03	1986-03-13	Epprecht, Georg	Converter for surface-acoustic waves (saw)

1984
- 1984-12-19 GB GB08432074A patent/GB2168869B/en not_active Expired

Also Published As

Publication number	Publication date
GB2168869A (en)	1986-06-25

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Legal Events

Date	Code	Title	Description
1992-10-21	732	Registration of transactions, instruments or events in the register (sect. 32/1977)
1998-04-22	732E	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
2000-03-15	732E	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
2003-03-19	732E	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
2003-07-23	732E	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
2005-01-12	PE20	Patent expired after termination of 20 years	Effective date: 20041218