GB1496067A - Broadband electroacoustic delay lines - Google Patents

Broadband electroacoustic delay lines

Info

Publication number
GB1496067A
GB1496067A GB180675A GB180675A GB1496067A GB 1496067 A GB1496067 A GB 1496067A GB 180675 A GB180675 A GB 180675A GB 180675 A GB180675 A GB 180675A GB 1496067 A GB1496067 A GB 1496067A
Authority
GB
United Kingdom
Prior art keywords
input
transducer
transducers
different
broad
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
Application number
GB180675A
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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
Application filed by Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Priority to GB180675A priority Critical patent/GB1496067A/en
Publication of GB1496067A publication Critical patent/GB1496067A/en
Expired 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
    • H03H9/36—Time-delay networks with non-adjustable delay time

Abstract

1496067 Broad-band delay lines LIGNES TELEGRAPHIQUES ET TELEPHONIQUES 15 Jan 1975 1806/75 Heading H3U [Also in Division H1] In a broad-band delay line, an input transducer 4 at one end of delay medium 1 (e.g. corundum) is tuned to a different acoustic frequency from its corresponding output transducer (not shown) at the other end, and each transducer is connected to a respective impedance 12, e.g. an inductance 20, to constitute a series resonant circuit having a resonant frequency which is different for each transducer/impedance combination and is different from the acoustic frequencies of the individual transducers. As shown, there are three input/output transducer pairs, the input transducers 4, 5, 6 being connected in parallel between input 16 and ground plane 15, and being connected to respective inductors 12, 13, 14 by strips 7<SP>1</SP> which may be resistive. The transducers comprise electrodes on a piezoelectric film, e.g. zinc oxide, or an alumina substrate 11. A microstrip line 10 on the substrate interconnects the input 16 and the transducers, pans 17, 18 of the line constituting capacitors.
GB180675A 1975-01-15 1975-01-15 Broadband electroacoustic delay lines Expired GB1496067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB180675A GB1496067A (en) 1975-01-15 1975-01-15 Broadband electroacoustic delay lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB180675A GB1496067A (en) 1975-01-15 1975-01-15 Broadband electroacoustic delay lines

Publications (1)

Publication Number Publication Date
GB1496067A true GB1496067A (en) 1977-12-21

Family

ID=9728346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB180675A Expired GB1496067A (en) 1975-01-15 1975-01-15 Broadband electroacoustic delay lines

Country Status (1)

Country Link
GB (1) GB1496067A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213012A (en) * 1987-11-26 1989-08-02 Asahi Glass Co Ltd Ultrasonic delay line
WO1990008965A1 (en) * 1989-02-03 1990-08-09 Thomson-Csf Personalized passive identification device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213012A (en) * 1987-11-26 1989-08-02 Asahi Glass Co Ltd Ultrasonic delay line
GB2213012B (en) * 1987-11-26 1991-12-11 Asahi Glass Co Ltd Ultrasonic delay line
US5130679A (en) * 1987-11-26 1992-07-14 Asahi Glass Company Ltd. Ultrasonic delay line mounted in a frame-like body having a wiring pattern thereon
WO1990008965A1 (en) * 1989-02-03 1990-08-09 Thomson-Csf Personalized passive identification device
FR2642873A1 (en) * 1989-02-03 1990-08-10 Thomson Csf CUSTOMIZABLE PASSIVE IDENTIFICATION DEVICE

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Legal Events

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