GB1483993A - Surface acoustic wave devices - Google Patents

Surface acoustic wave devices

Info

Publication number
GB1483993A
GB1483993A GB1201276A GB1201276A GB1483993A GB 1483993 A GB1483993 A GB 1483993A GB 1201276 A GB1201276 A GB 1201276A GB 1201276 A GB1201276 A GB 1201276A GB 1483993 A GB1483993 A GB 1483993A
Authority
GB
United Kingdom
Prior art keywords
transducers
transducer
diode
diodes
signal
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
GB1201276A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1201276A priority Critical patent/GB1483993A/en
Publication of GB1483993A publication Critical patent/GB1483993A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/36—Devices for manipulating acoustic surface waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

1483993 Surface wave amplification STANDARD TELEPHONES & CABLES Ltd 25 March 1976 12012/76 Heading H3U Surface waves propagating between an input and an output transducer or a piezoelectric body are amplified by a semi-conductor diode connected to an intermediate transducer. In the embodiment of Fig. 1, tunnel diodes 16 are connected to a plurality of intermediate transducers 15, with respective D.C. biases being applied at points A. Each diode may be provided with an RC damping network. The transducers 15 are spaced to give a mutual phase delay of (2r+ 1)#/2. Fig. 3, not shown, depicts an alternative shunt connection of a diode between two arbitrarily-spaced transducers. In the embodiment of Fig. 4, a pumping frequency signal, e.g. at twice the signal frequency, is applied at X to a varactor diode 46 terminated in an idler frequency transducer 47. Absorber material 48 is provided between adjacent transducers 47. In a modification, Fig. 5, the pumping signal is applied to the diodes by transducer 57a transmitting surface waves to transducers 57 which are connected to respective varactor diodes 56.
GB1201276A 1976-03-25 1976-03-25 Surface acoustic wave devices Expired GB1483993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1201276A GB1483993A (en) 1976-03-25 1976-03-25 Surface acoustic wave devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1201276A GB1483993A (en) 1976-03-25 1976-03-25 Surface acoustic wave devices

Publications (1)

Publication Number Publication Date
GB1483993A true GB1483993A (en) 1977-08-24

Family

ID=9996827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1201276A Expired GB1483993A (en) 1976-03-25 1976-03-25 Surface acoustic wave devices

Country Status (1)

Country Link
GB (1) GB1483993A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437070A1 (en) * 1978-09-22 1980-04-18 Clarion Co Ltd FREQUENCY SELECTOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437070A1 (en) * 1978-09-22 1980-04-18 Clarion Co Ltd FREQUENCY SELECTOR

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Legal Events

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