GB1470055A - Acoustic wave devices - Google Patents

Acoustic wave devices

Info

Publication number
GB1470055A
GB1470055A GB2041873A GB2041873A GB1470055A GB 1470055 A GB1470055 A GB 1470055A GB 2041873 A GB2041873 A GB 2041873A GB 2041873 A GB2041873 A GB 2041873A GB 1470055 A GB1470055 A GB 1470055A
Authority
GB
United Kingdom
Prior art keywords
acoustic wave
oscillator
outputs
transducers
frequency
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
GB2041873A
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.)
MACQUEEN R
Original Assignee
MACQUEEN R
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 MACQUEEN R filed Critical MACQUEEN R
Priority to GB2041873A priority Critical patent/GB1470055A/en
Publication of GB1470055A publication Critical patent/GB1470055A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/326—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator the resonator being an acoustic wave device, e.g. SAW or BAW device

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

1470055 Acoustic wave devices; oscillators M F LEWIS and R A MACQUEEN 29 April 1974 [30 April 1973] 20418/73 Headings H3U and H3F An acoustic wave device, as disclosed in Specification 1,451,326, has an input transducer 51 and output transducers 55, 57 which are longitudinally spaced so as to receive acoustic waves which are out of phase, means being provided to combine the outputs in variable proportions. In a first embodiment, Fig. 1, the combining means is a potentiometer 59 whose slider 61 is connected via amplifier 50 to the input transducer 51 to form an oscillator. The transducers 55, 57 are separated by #/4, where # is the average wavelength of surface waves emitted by transducer 51, and the frequency of the oscillator is varied by adjusting the potentiometer slider 61. In a second embodiment, Fig. 2, the outputs of transducers 55, 57 are fed to respective variable-gain amplifiers 63, 65 whose outputs are both connected to amplifier 50. The frequency of the oscillator is varied by varying the gains of amplifiers 63, 65 relative to one another. Rapid electrical control of the gains may be used to effect frequency modulation.
GB2041873A 1974-04-29 1974-04-29 Acoustic wave devices Expired GB1470055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2041873A GB1470055A (en) 1974-04-29 1974-04-29 Acoustic wave devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2041873A GB1470055A (en) 1974-04-29 1974-04-29 Acoustic wave devices

Publications (1)

Publication Number Publication Date
GB1470055A true GB1470055A (en) 1977-04-14

Family

ID=10145635

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2041873A Expired GB1470055A (en) 1974-04-29 1974-04-29 Acoustic wave devices

Country Status (1)

Country Link
GB (1) GB1470055A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004350A1 (en) * 1982-05-25 1983-12-08 Nippon Telegraph & Telephone Variable frequency oscillator
GB2142197A (en) * 1983-06-23 1985-01-09 Racal Res Ltd Oscillator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004350A1 (en) * 1982-05-25 1983-12-08 Nippon Telegraph & Telephone Variable frequency oscillator
US4590442A (en) * 1982-05-25 1986-05-20 Nippon Telegraph & Telephone Corporation Variable high frequency oscillator
GB2142197A (en) * 1983-06-23 1985-01-09 Racal Res Ltd Oscillator

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Legal Events

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