Patent US2669689A successfully refreshed from Google Patents.
Patent US4740746A successfully refreshed from Google Patents.
US4740746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled impedance microcircuit probe
Assignee: Tektronix Inc
•
Filing: 1987-02-24
•
Granted: 1988-04-26
•
Expires: 2007-02-24
Abstract
Abstract A probe for coupling electrical test equipment to a selected point of an electrical device has a resiliently supported rigid pin for contacting the selected point and a wave guide of substantially constant characteristic impedance coupling the test equipment to the pin.
Inventors
- 👤 Ira G. Pollock
- 👤 Jon C. Manor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:31
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/06772; G01R1/06711; G01R1/06716; G01R1/06722; H; H01; H01R; H01R11/00; H01R11/11; H01R11/18; G01R1/06733; G01R1/06738; H01R13/00; H01R13/02; H01R13/22; H01R13/24; H01R13/2407; H01R13/2421; H01R9/00; H01R9/03; H01R9/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A process for coupling electrical test equipment to a selected point in an electrical device, comprising: a coaxial waveguide having an inner conductor, a dielectric, and an outer conductor, the inner conductor and outer conductor being separated by the dielectric, the dielectric having a constant thickness, and the dielectric and the outer conductor extending beyond the inner conductor; means for coupling the coaxial waveguide to the test equipment; a rigid conductive pin for contacting the selected point, the pin having a constant outer dimension which is the same as the outer dimension of the inner conductor; and means for connecting the pin to the inner conductor, the connecting means being conductive and resilient and having an outer dimension which is the same as the outer dimension of the inner conductor, the connecting means and the rigid pin forming an extension of the inner conductor within the extension of the dielectric and the outer conductor so that the inner conductor and the extension of the inner conductor maintain a constant outer dimension to provide an essentially constant characteristic impedance over the length of the probe.
Claim 2
Dependent Claim
184 words
A process for coupling electrical test equipment to a selected point in an electrical device, comprising: a coaxial waveguide having an inner conductor, a dielectric, and an outer conductor, the inner conductor and outer conductor being separated by the dielectric, the dielectric having a constant thickness, and the dielectric and the outer conductor extending beyond the inner conductor; means for coupling the coaxial waveguide to the test equipment; a rigid conductive pin for contacting the selected point, the pin having a constant outer dimension which is the same as the outer dimension of the inner conductor; and means for connecting the pin to the inner conductor, the connecting means being conductive and resilient and having an outer dimension which is the same as the outer dimension of the inner conductor, the connecting means and the rigid pin forming an extension of the inner conductor within the extension of the dielectric and the outer conductor so that the inner conductor and the extension of the inner conductor maintain a constant outer dimension to provide an essentially constant characteristic impedance over the length of the probe.
Claim 3
Dependent Claim
15 words
A probe as recited in claim 1 wherein the connecting means is a coil spring.
Claim 4
Dependent Claim
208 words
A probe for coupling electrical test equipment to a signal point and a ground point in an electrical device, comprising: a coaxial waveguide having an inner conductor, a dielectric, and an outer conductor, the inner conductor and outer conductor being separated by the dielectric, the dielectric having a constant thickness, and the dielectric and the outer conductor extending beyond the inner conductor; means for coupling the coaxial waveguide to the test equipment; a rigid conductive signal pin for contacting the signal point, the signal pin having a constant outer dimension which is the same as the outer dimension of the inner conductor; a rigid conductive ground pin for contacting the ground point, the ground pin being in electrical contact with the outer conductor; and means for connecting the signal pin to the inner conductor, the connecting means being conductive and resilient and having an outer dimension which is the same as the outer dimension of the inner conductor, the connecting means and the signal pin forming an extension of the inner conductor within the extension of the dielectric and the outer conductor so that the inner conductor and the extension maintain a constant outer dimension to provide an essentially constant characteristic impedance over the length of the probe.
Claim 5
Dependent Claim
208 words
A probe for coupling electrical test equipment to a signal point and a ground point in an electrical device, comprising: a coaxial waveguide having an inner conductor, a dielectric, and an outer conductor, the inner conductor and outer conductor being separated by the dielectric, the dielectric having a constant thickness, and the dielectric and the outer conductor extending beyond the inner conductor; means for coupling the coaxial waveguide to the test equipment; a rigid conductive signal pin for contacting the signal point, the signal pin having a constant outer dimension which is the same as the outer dimension of the inner conductor; a rigid conductive ground pin for contacting the ground point, the ground pin being in electrical contact with the outer conductor; and means for connecting the signal pin to the inner conductor, the connecting means being conductive and resilient and having an outer dimension which is the same as the outer dimension of the inner conductor, the connecting means and the signal pin forming an extension of the inner conductor within the extension of the dielectric and the outer conductor so that the inner conductor and the extension maintain a constant outer dimension to provide an essentially constant characteristic impedance over the length of the probe.
Claim 6
Dependent Claim
15 words
A probe as recited in claim 3 wherein the connecting means is a coil spring.
References Cited (Backward Citations)
US4116523A
Cited
US4383217A
Cited
DE2924262A1
Cited
GB2066590A
Cited
US4355857A
Cited
GB2113483A
Cited
EP0137370A2
Cited
US4636722A
Cited
US4593243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |