Patent US8142365B2 successfully refreshed from Google Patents.
US4639697A
Expired / Lapsed
US
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Temperature compensation circuitry
Assignee: Raytheon Co
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Filing: 1984-09-13
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Granted: 1987-01-27
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Expires: 2004-09-13
Abstract
Abstract A surface acoustic wave (SAW) device provides a phase shift and a first predetermined phase shift variation as a function of temperature. A passive network including a passive, reactive component is thermally and electrically coupled to the SAW device. An electrical characteristic of the component has a predetermined variation as a function of the temperature of the reactive component which provides the network with a second, predetermined phase variation as a function of temperature to compensate for the first predetermined phase variation as a function of temperature provided from the surface acoustic wave device. With this arrangement, the phase shift provided from the surface acoustic wave device is substantially invariant with temperature.
Inventors
- 👤 Arthur Yarranton
- 👤 Charles E. Chase, Jr.
- 👤 Jean E. Picquendar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:56
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02535; H03H9/02818; H03H9/02834; H03H9/66; H03H9/68
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
262 words
In combination: means for providing a signal having a predetermined amplitude; means for feeding at least a portion of said signal back to an input of said amplitude means, said feedback means further comprising: (a) means operative over a predetermined temperature range for providing said signal portion with a a predetermined delay relative to the signal at an output of said amplitude means and a predetermined delay variation over the operative temperature of said delay means, said delay means further comprising: (i) a substrate comprising ST-cut quartz, said substrate having a surface which supports surface wave propagation and having a surface wave velocity characteristic which varies nonlinearly over said operative temperature range to provide said delay means with the delay variation over said operative temperature range; (ii) an input transducer and an output transducer, each one being coupled to said surface wave propagating surface, with said signal portion from said amplitude means being fed to the input transducer, and said output transducer providing said signal portion fed to the input of said amplitude means having the predetermined delay and predetermined delay variation (b) means including at least one passive reactive component electrically coupled to said delay means and having a reactance characteristic responsive to the temperature of the delay means, for providing a phase shift variation as a function of temperature to compensate for the delay variations provided to signal fed to the input of said amplitude means to provide said signal fed to the input of said amplitude means with a substantially reduced phase shift variation over the operative temperature range.
Claim 2
Dependent Claim
262 words
In combination: means for providing a signal having a predetermined amplitude; means for feeding at least a portion of said signal back to an input of said amplitude means, said feedback means further comprising: (a) means operative over a predetermined temperature range for providing said signal portion with a a predetermined delay relative to the signal at an output of said amplitude means and a predetermined delay variation over the operative temperature of said delay means, said delay means further comprising: (i) a substrate comprising ST-cut quartz, said substrate having a surface which supports surface wave propagation and having a surface wave velocity characteristic which varies nonlinearly over said operative temperature range to provide said delay means with the delay variation over said operative temperature range; (ii) an input transducer and an output transducer, each one being coupled to said surface wave propagating surface, with said signal portion from said amplitude means being fed to the input transducer, and said output transducer providing said signal portion fed to the input of said amplitude means having the predetermined delay and predetermined delay variation (b) means including at least one passive reactive component electrically coupled to said delay means and having a reactance characteristic responsive to the temperature of the delay means, for providing a phase shift variation as a function of temperature to compensate for the delay variations provided to signal fed to the input of said amplitude means to provide said signal fed to the input of said amplitude means with a substantially reduced phase shift variation over the operative temperature range.
Claim 3
Dependent Claim
49 words
The combination of claim 1 wherein said delay variation reducing means further comprises at least one inductive element and at least one capacitive element connected in series and coupled to one of said transducers, with at least one of said inductive and capacitive elements having the predetermined reactance variation.
Claim 4
Dependent Claim
34 words
The combination of claim 2 wherein said inductive element has the predetermined reactance variation and comprises a magnetic material having a magnetic permeability which varies in a predetermined nonlinear manner over said operative range.
Claim 5
Dependent Claim
46 words
The combination of claim 3 wherein said inductive element has the predetermined reactance variation and comprises: a pair of solenoids; a magnetic material disposed within portions of said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature.
Claim 6
Dependent Claim
31 words
The combination of claim 4 wherein said displacing means further comprises a member having a predetermined coefficient of thermal expansion, said member being placed in a cooperative with said magnetic material.
Claim 7
Dependent Claim
14 words
The combination of claim 2 wherein said capacitive element has the predetermined reactance variation.
Claim 8
Dependent Claim
86 words
The combination of claim 6 wherein said capacitor comprises: a center conductive member; a pair of mutually spaced conductive members, each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 9
Dependent Claim
19 words
The combination of claim 7 wherein said displacing means comprises a dielectric having a predetermined coefficient of thermal expansion.
Claim 10
Dependent Claim
18 words
The combination of claim 8 wherein said dielectric comprises a fluid having a predetermined coefficient of thermal expansion.
Claim 11
Dependent Claim
18 words
The combination of claim 8 wherein said dielectric comprises a member having a predetermined coefficient of thermal expansion.
Claim 12
Dependent Claim
101 words
In combination: a surface acoustic wave device to provide in response to an input signal, an output signal having a first predetermined phase shift and a first predetermined phase shift variation as a function of temperature with respect to the input signal; and means, disposed to have at least one of said input and output signals coupled therethrough, said means including a passive component having an electrical characteristic which varies as a function of the temperature of the component, for providing a second temperature dependent predetermined phase shift variation to reduce the temperature dependent phase shift variation of said output signal.
Claim 13
Dependent Claim
101 words
In combination: a surface acoustic wave device to provide in response to an input signal, an output signal having a first predetermined phase shift and a first predetermined phase shift variation as a function of temperature with respect to the input signal; and means, disposed to have at least one of said input and output signals coupled therethrough, said means including a passive component having an electrical characteristic which varies as a function of the temperature of the component, for providing a second temperature dependent predetermined phase shift variation to reduce the temperature dependent phase shift variation of said output signal.
Claim 14
Dependent Claim
64 words
The combination of claim 11 wherein the passive component is a reactive component and wherein said means for providing a second phase shift variation comprises: at least one inductive element and at least one capacitive element connected in series with a first one of said input and output transducers, with at least one of said inductive and capacitive elements having the predetermined reactance variation.
Claim 15
Dependent Claim
14 words
The combination of claim 12 wherein the inductive element has the predetermined reactance variation.
Claim 16
Dependent Claim
33 words
The combination of claim 13 wherein said inductor comprises a magnetic member having a magnetic permeability which varies in a predetermined manner as a function of temperature to provide said predetermined reactance variation.
Claim 17
Dependent Claim
39 words
The combination of claim 13 wherein said inductor comprises: a pair of solenoids; a magnetic material disposed within portions of said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature.
Claim 18
Dependent Claim
31 words
The combination of claim 15 wherein said displacing means comprises a member having a predetermined coefficient of thermal expansion, said member being placed in a cooperative relationship with said magnetic material.
Claim 19
Dependent Claim
19 words
The combination of claim 12 wherein passive element is a capacitor said capacitor element has the predetermined reactance variation.
Claim 20
Dependent Claim
86 words
The combination of claim 17 wherein said capacitor comprises: a center conductive member; a pair of mutually spaced conductive members, each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 21
Dependent Claim
19 words
The combination of claim 18 wherein said displacing means comprises a dielectric having a predetermined coefficient of thermal expansion.
Claim 22
Dependent Claim
18 words
The combination of claim 19 wherein said dielectric comprises a fluid having a predetermined coefficient of thermal expansion.
Claim 23
Dependent Claim
18 words
The combination of claim 19 wherein said dielectric comprises a member having a predetermined coefficient of thermal expansion.
Claim 24
Dependent Claim
218 words
An oscillator comprising: (a) means for providing a signal at an output thereof having a predetermined amplitude; (b) means for feeding at least a portion of said signal back to an input of said amplitude means, said feedback means comprising: (i) means for providing a predetermined phase shift characteristic to said signal fed to the input of the amplitude means relative to the phase of the signal provided from the output of the amplitude means comprising: (a) means for supporting surface wave propagation having a surface wave velocity characteristic which varies in a first predetermined manner as a function of temperature; (b) input and output transducers, each coupled to said surface wave propagation means; (c) wherein said signal is fed to the input transducer and received at the output transducer and is provided with a predetermined phase shift and a predetermined phase shift temperature dependent variation in accordance with the surface wave velocity characteristic and temperature dependent variation in surface wave velocity of the surface wave support means; (ii) means, including at least one passive reactive element having a predetermined reactance variation as a function of the temperature of the element, and disposed to react to the temperature of the phase shift means for providing, said signal with a substantially invariant delay variation as a function of temperature.
Claim 25
Dependent Claim
218 words
An oscillator comprising: (a) means for providing a signal at an output thereof having a predetermined amplitude; (b) means for feeding at least a portion of said signal back to an input of said amplitude means, said feedback means comprising: (i) means for providing a predetermined phase shift characteristic to said signal fed to the input of the amplitude means relative to the phase of the signal provided from the output of the amplitude means comprising: (a) means for supporting surface wave propagation having a surface wave velocity characteristic which varies in a first predetermined manner as a function of temperature; (b) input and output transducers, each coupled to said surface wave propagation means; (c) wherein said signal is fed to the input transducer and received at the output transducer and is provided with a predetermined phase shift and a predetermined phase shift temperature dependent variation in accordance with the surface wave velocity characteristic and temperature dependent variation in surface wave velocity of the surface wave support means; (ii) means, including at least one passive reactive element having a predetermined reactance variation as a function of the temperature of the element, and disposed to react to the temperature of the phase shift means for providing, said signal with a substantially invariant delay variation as a function of temperature.
Claim 26
Dependent Claim
13 words
The combination of claim 22 wherein said passive reactive element is an inductor.
Claim 27
Dependent Claim
33 words
The combination of claim 23 wherein said inductor comprises a magnetic member having a magnetic permeability which varies in a predetermined manner as a function of temperature to provide the predetermined reactance variation.
Claim 28
Dependent Claim
39 words
The combination of claim 23 wherein said inductor comprises: a pair of solenoids; a magnetic material disposed within portions of said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature.
Claim 29
Dependent Claim
31 words
The combination of claim 25 wherein said displacing means comprises a member having a predetermined coefficient of thermal expansion, said member being placed in a cooperative relationship with said magnetic material.
Claim 30
Dependent Claim
12 words
The combination of claim 22 wherein said passive element is a capacitor.
Claim 31
Dependent Claim
86 words
The combination of claim 27 wherein said capacitor comprises: a center conductive member; a pair of mutually spaced conductive members, each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 32
Dependent Claim
19 words
The combination of claim 28 wherein said displacing means comprises a dielectric having a predetermined coefficient of thermal expansion.
Claim 33
Dependent Claim
18 words
The combination of claim 29 wherein said dielectric comprises a fluid having a predetermined coefficient of thermal expansion.
Claim 34
Dependent Claim
18 words
The combination of claim 29 wherein said dielectric comprises a member having a predetermined coefficient of thermal expansion.
Claim 35
Dependent Claim
209 words
A delay element comprising: means, operative over a predetermined temperature range, for providing an output signal having a predetermined, nominal delay with respect to an input signal fed to an input of the delay means, such delay varying from such nominal delay over the predetermined operating temperature range of the delay means, said means further comprising: (i) means for supporting surface wave propagation having a surface wave velocity characteristic which varies in a predetermined manner over said temperature range; (ii) an input transducer fed by the input signal and an output transducer providing said output signal, said transducers each being coupled to said surface wave propagation means; means, including an electrical component having a temperature dependent electrical characteristic and disposed to have the temperature dependent electrical characteristic thereof respond to the operative temperature of the delay means, said electrical component being electrically coupled to the delay means, for providing a temperature compensating delay to the signal fed to the delay element, such signal passing through the delay means and the electrical component of the temperature compensating delay means, such compensating delay varying with the temperature dependent electrical characteristic of the electrical component to provide the delay element with a substantially temperature invariant delay characteristic over the predetermined operating range.
Claim 36
Dependent Claim
209 words
A delay element comprising: means, operative over a predetermined temperature range, for providing an output signal having a predetermined, nominal delay with respect to an input signal fed to an input of the delay means, such delay varying from such nominal delay over the predetermined operating temperature range of the delay means, said means further comprising: (i) means for supporting surface wave propagation having a surface wave velocity characteristic which varies in a predetermined manner over said temperature range; (ii) an input transducer fed by the input signal and an output transducer providing said output signal, said transducers each being coupled to said surface wave propagation means; means, including an electrical component having a temperature dependent electrical characteristic and disposed to have the temperature dependent electrical characteristic thereof respond to the operative temperature of the delay means, said electrical component being electrically coupled to the delay means, for providing a temperature compensating delay to the signal fed to the delay element, such signal passing through the delay means and the electrical component of the temperature compensating delay means, such compensating delay varying with the temperature dependent electrical characteristic of the electrical component to provide the delay element with a substantially temperature invariant delay characteristic over the predetermined operating range.
Claim 37
Dependent Claim
12 words
The combination of claim 32 wherein said electrical component is an inductor.
Claim 38
Dependent Claim
27 words
The combination of claim 33 wherein said inductor comprises a magnetic member having a magnetic permeability which varies in a predetermined manner as a function of temperature.
Claim 39
Dependent Claim
60 words
The combination of claim 33 wherein said inductor comprises: a pair of solenoids fed by the signal passing through the temperature compensating means; a magnetic material disposed within portions of the magnetic fields provided in response to said signal fed to said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature.
Claim 40
Dependent Claim
31 words
The combination of claim 35 wherein said displacing means comprises a member having a predetermined coefficient of thermal expansion, said member being placed in a cooperative relationship with said magnetic material.
Claim 41
Dependent Claim
12 words
The combination of claim 32 wherein said electrical component is a capacitor.
Claim 42
Dependent Claim
86 words
The combination of claim 37 wherein said capacitor comprises: a center conductive member; a pair of mutually spaced conductive members, each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 43
Dependent Claim
19 words
The combination of claim 38 wherein said displacing means comprises a dielectric having a predetermined coefficient of thermal expansion.
Claim 44
Dependent Claim
18 words
The combination of claim 39 wherein said dielectric comprises a fluid having a predetermined coefficient of thermal expansion.
Claim 45
Dependent Claim
18 words
The combination of claim 39 wherein said dielectric comprises a member having a predetermined coefficient of thermal expansion.
Claim 46
Dependent Claim
58 words
An inductor comprising: a pair of solenoids connected in parallel; a body comprised of a magnetic material disposed within portions of each of said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature to provide said inductor with a parabolic inductance variation in accordance with said changes in temperature.
Claim 47
Dependent Claim
58 words
An inductor comprising: a pair of solenoids connected in parallel; a body comprised of a magnetic material disposed within portions of each of said solenoids; and means for displacing said magnetic material within said solenoids as a function of changes in temperature to provide said inductor with a parabolic inductance variation in accordance with said changes in temperature.
Claim 48
Dependent Claim
31 words
The combination of claim 42 wherein said displacing means comprises a member having a predetermined coefficient of thermal expansion, said member being placed in a cooperative relationship with said magnetic material.
Claim 49
Dependent Claim
88 words
A capactior comprising: a center conductive member; a pair of mutually spaced conductive members, coaxially disposed around and each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in an axial direction in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 50
Dependent Claim
88 words
A capactior comprising: a center conductive member; a pair of mutually spaced conductive members, coaxially disposed around and each being dielectrically spaced from said center conductive member, and each member arranged to be capacitively coupled to a portion of said center conductive member; and means for displacing in an axial direction in accordance with variations in temperature a first one of the center conductive member and pair of spaced conductive members with respect to a second one of the center conductive member and pair of spaced conductive members.
Claim 51
Dependent Claim
28 words
The combination of claim 44 wherein said displacing means comprises a dielectric having a predetermined coefficient of thermal expansion and said center conductor is disposed around said dielectric.
Claim 52
Dependent Claim
20 words
The combination of claim 44 wherein said means for displacing comprises a fluid having a predetermined coefficient of thermal expansion.
Claim 53
Dependent Claim
18 words
The combination of claim 45 wherein said dielectric comprises a member having a predetermined coefficient of thermal expansion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |