Patent US2391809A successfully refreshed from Google Patents.
Patent US4034288A successfully refreshed from Google Patents.
US4034288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for measuring the frequency of an electrical signal
Assignee: Thales SA
•
Filing: 1975-06-13
•
Granted: 1977-07-05
•
Expires: 1995-06-13
Abstract
Abstract The present invention relates to system for measuring the frequency of an electrical signal. The device in accordance with the invention comprises, deposited upon a piezo-electric substrate a transducer array in the form of interdigital comb structures whose teeth are in the form of a circular arc and which are capable of emitting surface elastic waves at the surface of the substrate, and a series of pick-ups elements of substantially point type, arranged to selectively receive said surface elastic waves.
Inventors
- 👤 Pierre Hartemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:59
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/36; G01; G01R; G01R23/00; G01R23/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a frequency steerable narrow beam of said vibratory energy; said narrow beam having in said face N distinctly orientated transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two.
Claim 2
Independent Claim
125 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a frequency steerable narrow beam of said vibratory energy; said narrow beam having in said face N distinctly orientated transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two.
Claim 3
Dependent Claim
38 words
A system as claimed in claim 1, further comprising between said transducer array and said elementary detection means, means located on said face for concentrating said narrow beam at the respective detection zones of said elementary detection means.
Claim 4
Dependent Claim
70 words
A system as claimed in claim 1, wherein said transducer array is constituted by electrodes of interdigital comb type; the teeth of said electrodes delimiting an assembly of discrete radiating gaps emitting elastic waves; the teeth adjacent to an arbitrary radiator element in said assembly being in the form of concentric circular arcs; the geometric centre of said concentric circular arcs being the emission phase centre of said radiator element.
Claim 5
Dependent Claim
18 words
A system as claimed in claim 3, wherein the geometric centres of said radiator elements are equidistantly spaced.
Claim 6
Dependent Claim
31 words
A system as claimed in claim 2 wherein said concentrating means are constituted by a thin metal layer deposited upon the surface of said substrate; said layer building up a lens.
Claim 7
Dependent Claim
21 words
A system as claimed in claim 1, further comprising intermediate means for amplifying the angle of deviation of said narrow beam.
Claim 8
Independent Claim
150 words
A system for measuring the frequency of an electrical signal having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said system further comprising intermediate means for amplifying the angle of deviation of said narrow beam, and said intermediate means being constituted by a phase grating diffracting the surface elastic waves received from said transducer array.
Claim 9
Independent Claim
150 words
A system for measuring the frequency of an electrical signal having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said system further comprising intermediate means for amplifying the angle of deviation of said narrow beam, and said intermediate means being constituted by a phase grating diffracting the surface elastic waves received from said transducer array.
Claim 10
Independent Claim
168 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said system further comprising intermediate means for amplifying the angle of deviation of said narrow beam, and said intermediate means being constituted by a thin metal layer deposited upon the surface of said substrate; the outline of said layer being in the form of a triangle.
Claim 11
Independent Claim
168 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said system further comprising intermediate means for amplifying the angle of deviation of said narrow beam, and said intermediate means being constituted by a thin metal layer deposited upon the surface of said substrate; the outline of said layer being in the form of a triangle.
Claim 12
Independent Claim
146 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said elementary detection means being each constituted by a field effect semiconductor structure; said structure comprising a channel in the form of a spiral.
Claim 13
Independent Claim
146 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said elementary detection means being each constituted by a field effect semiconductor structure; said structure comprising a channel in the form of a spiral.
Claim 14
Independent Claim
139 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said elementary detection means being each constituted by an electrically conductive probe connected to a potential-measuring device.
Claim 15
Independent Claim
139 words
A system for measuring the frequency of an electrical signal, said system comprising: a substrate of piezo-electric material having a face for propagating vibratory energy in the form of surface elastic waves, and a transducer array of radiator elements positioned on said face for launching in response to said electrical signal a narrow beam of said vibratory energy; said narrow beam having in said face N distinct transmission paths respectively corresponding to N distinct values of said frequency; said system further comprising a set of N elementary detection means respectively located on said face along said N distinct transmission paths for supplying an indication relative to any one of said N distinct values; N being an integer at least equal to two; said elementary detection means being each constituted by an electrically conductive probe connected to a potential-measuring device.
Claim 16
Dependent Claim
17 words
A system as claimed in claim 1, wherein said substrate is constituted by an isotropic ceramic material.
References Cited (Backward Citations)
US3697899A
Cited
US3727718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |