GB2236637B - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
GB2236637B
GB2236637B GB9017436A GB9017436A GB2236637B GB 2236637 B GB2236637 B GB 2236637B GB 9017436 A GB9017436 A GB 9017436A GB 9017436 A GB9017436 A GB 9017436A GB 2236637 B GB2236637 B GB 2236637B
Authority
GB
United Kingdom
Prior art keywords
acoustic wave
surface acoustic
wave device
wave
acoustic
Prior art date
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 - Fee Related
Application number
GB9017436A
Other versions
GB2236637A (en
GB9017436D0 (en
Inventor
Teruo Niitsuma
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co Ltd
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.)
Filing date
Publication date
Priority claimed from JP21199989A external-priority patent/JP2742713B2/en
Priority claimed from JP21200089A external-priority patent/JPH0374921A/en
Application filed by Clarion Co Ltd filed Critical Clarion Co Ltd
Publication of GB9017436D0 publication Critical patent/GB9017436D0/en
Publication of GB2236637A publication Critical patent/GB2236637A/en
Application granted granted Critical
Publication of GB2236637B publication Critical patent/GB2236637B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H03H9/42—Time-delay networks using surface acoustic waves
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
    • G06G7/195—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions using electro- acoustic elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; 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
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
GB9017436A 1989-08-16 1990-08-09 Surface acoustic wave device Expired - Fee Related GB2236637B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21199989A JP2742713B2 (en) 1989-08-16 1989-08-16 Surface acoustic wave device
JP21200089A JPH0374921A (en) 1989-08-16 1989-08-16 Surface acoustic wave device

Publications (3)

Publication Number Publication Date
GB9017436D0 GB9017436D0 (en) 1990-09-26
GB2236637A GB2236637A (en) 1991-04-10
GB2236637B true GB2236637B (en) 1993-07-28

Family

ID=26518956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9017436A Expired - Fee Related GB2236637B (en) 1989-08-16 1990-08-09 Surface acoustic wave device

Country Status (2)

Country Link
DE (1) DE4026000A1 (en)
GB (1) GB2236637B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675163A (en) * 1970-08-26 1972-07-04 Clinton S Hartmann Cascaded f. m. correlators for long pulses
EP0212399A2 (en) * 1985-08-21 1987-03-04 Siemens Aktiengesellschaft Dual-track acoustic-wave convolver with self-convolution suppression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675163A (en) * 1970-08-26 1972-07-04 Clinton S Hartmann Cascaded f. m. correlators for long pulses
EP0212399A2 (en) * 1985-08-21 1987-03-04 Siemens Aktiengesellschaft Dual-track acoustic-wave convolver with self-convolution suppression

Also Published As

Publication number Publication date
GB2236637A (en) 1991-04-10
DE4026000A1 (en) 1991-02-21
GB9017436D0 (en) 1990-09-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960809