GB1501123A – Acoustic surface wave devices having performance versus temperature characteristics
– Google Patents
GB1501123A – Acoustic surface wave devices having performance versus temperature characteristics
– Google Patents
Acoustic surface wave devices having performance versus temperature characteristics
Info
Publication number
GB1501123A
GB1501123A
GB6409/75A
GB640975A
GB1501123A
GB 1501123 A
GB1501123 A
GB 1501123A
GB 6409/75 A
GB6409/75 A
GB 6409/75A
GB 640975 A
GB640975 A
GB 640975A
GB 1501123 A
GB1501123 A
GB 1501123A
Authority
GB
United Kingdom
Prior art keywords
delay
amplifier
paths
surface wave
transducers
Prior art date
1974-06-24
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
GB6409/75A
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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.)
1974-06-24
Filing date
1975-02-14
Publication date
1978-02-15
1975-02-14
Application filed by Hewlett Packard Co
filed
Critical
Hewlett Packard Co
1978-02-15
Publication of GB1501123A
publication
Critical
patent/GB1501123A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
239000000758
substrate
Substances
0.000
abstract
2
230000004048
modification
Effects
0.000
abstract
1
238000012986
modification
Methods
0.000
abstract
1
230000010363
phase shift
Effects
0.000
abstract
1
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
Abstract
1501123 Surface wave delay lines HEWLETTPACKARD CO 14 Feb 1975 [24 June 1974] 6409/75 Heading H3U A surface wave delay line comprises a plurality of delay paths on a single substrate, the paths being arranged on surface regions having different crystallographic orientations so as to extend the substantially constant portion of the phase shift against ambient temperature characteristic. The delay line may be used in the feed back loop of an amplifier to provide a frequency-stable oscillator. In a first embodiment, Fig. 5, the delay path formed by interdigital transducers 52a, 52b on surface 11 is coupled via intermediate amplifier 55 to a delay path formed by transducers 54a, 54b on surface 13, amplifier 56 being the oscillator amplifier. Alternatively the delay paths may be coupled via a curved end face of the substrate (Fig. 6, not shown). In a final embodiment, Fig. 7, three delay paths on relatively inclined surfaces 71, 72, 73 are cascaded via intermediate amplifiers 77, 79. In a modification these amplifiers may be omitted and direct connections made between transducers 74A and 76A, and 76B and 78B. Also, it is envisaged that surfaces 71, 72, 73 might be combined into a single curved surface.
GB6409/75A
1974-06-24
1975-02-14
Acoustic surface wave devices having performance versus temperature characteristics
Expired
GB1501123A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US482050A
US3886484A
(en)
1974-06-24
1974-06-24
Acoustic surface wave devices having improved performance versus temperature characteristics
Publications (1)
Publication Number
Publication Date
GB1501123A
true
GB1501123A
(en)
1978-02-15
Family
ID=23914448
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB6409/75A
Expired
GB1501123A
(en)
1974-06-24
1975-02-14
Acoustic surface wave devices having performance versus temperature characteristics
Country Status (3)
Country
Link
US
(1)
US3886484A
(en)
JP
(1)
JPS5513641B2
(en)
GB
(1)
GB1501123A
(en)
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3999147A
(en)
*
1975-10-31
1976-12-21
Hughes Aircraft Company
Temperature stable surface acoustic wave and oscillator using the device
FR2358051A1
(en)
*
1976-07-09
1978-02-03
Thomson Csf
SURFACE ELASTIC WAVE OSCILLATOR
GB1591624A
(en)
*
1977-01-24
1981-06-24
Secr Defence
Acoustic wave devices
JPS53145595A
(en)
*
1977-05-25
1978-12-18
Nippon Telegr & Teleph Corp
Elastic surface wave oscillator
GB2033185B
(en)
*
1978-09-22
1983-05-18
Secr Defence
Acoustic wave device with temperature stabilisation
IT1110223B
(en)
*
1978-12-28
1985-12-23
Cselt Centro Studi Lab Telecom
Two-port element thermal phase variation compensator – is connected in cascade with controlled unit and having opposite-sense thermal variation based on quartz substrate
JPS55121729A
(en)
*
1979-03-12
1980-09-19
Seiko Instr & Electronics Ltd
Surface elastic wave element
US4489289A
(en)
*
1982-04-08
1984-12-18
The United States Of America As Represented By The Secretary Of The Air Force
Saw oscillator with digital compensation for temperature related frequency changes
US4512198A
(en)
*
1982-09-29
1985-04-23
Schlumberger Technology Corporation
Surface acoustic wave sensors
US4586382A
(en)
*
1982-09-29
1986-05-06
Schlumberger Technology Corporation
Surface acoustic wave sensors
US4602182A
(en)
*
1984-05-25
1986-07-22
The United States Of America As Represented By The Secretary Of The Air Force
X33 cut quartz for temperature compensated SAW devices
US5367216A
(en)
*
1991-08-02
1994-11-22
Canon Kabushiki Kaisha
Surface acoustic wave element and communication system using the same
US6843157B2
(en)
*
2002-06-13
2005-01-18
Autoliv Asp, Inc.
Severing vehicle battery cable
EP1658670B1
(en)
*
2003-08-25
2008-01-23
Tele Filter GmbH
Oscillator with an acoustic surface wave resonator
US20070079656A1
(en)
*
2005-10-11
2007-04-12
Honeywell International Inc.
Micro-machined acoustic wave accelerometer
DE102005060923A1
(en)
*
2005-12-14
2007-06-21
Leibnitz-Institut für Festkörper- und Werkstoffforschung Dresden e.V.
Oscillator circuit for e.g. electronics, has acoustic surface wave resonator provided as frequency determining unit, and coupler inductance selected so that temperature dependant changes of total phase of remaining units have opposite signs
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3815056A
(en)
*
1971-08-11
1974-06-04
Raytheon Co
Continuous surface wave device
US3781721A
(en)
*
1972-11-30
1973-12-25
Hughes Aircraft Co
Acoustic surface wave device eliminating spurious end reflections
US3831116A
(en)
*
1973-04-09
1974-08-20
Raytheon Co
Surface acoustic wave filter
1974
1974-06-24
US
US482050A
patent/US3886484A/en
not_active
Expired – Lifetime
1975
1975-02-14
GB
GB6409/75A
patent/GB1501123A/en
not_active
Expired
1975-06-24
JP
JP7855675A
patent/JPS5513641B2/ja
not_active
Expired
Also Published As
Publication number
Publication date
JPS5513641B2
(en)
1980-04-10
JPS5118453A
(en)
1976-02-14
US3886484A
(en)
1975-05-27
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Legal Events
Date
Code
Title
Description
1978-06-28
PS
Patent sealed [section 19, patents act 1949]
1982-09-08
PCNP
Patent ceased through non-payment of renewal fee
