US3300718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test probe apparatus employing feedback reduction of the distributed capacitance ofthe signal cable
Assignee: HP Inc
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Filing: 1963-08-12
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Granted: 1967-01-24
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 James M Umphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:34
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/34; G01R13/342; H03H; H03H2/00; H03H2/005; H03H2/008; H03K; H03K5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
SIGNALLING APPARATUS COMPRISING: AN INPUT FOR RECEIVING AN APPLIED SIGNAL WITH RESPECT TO A REFERENCE POTENTIAL; A STORAGE CAPACITOR AND AN IMPEDANCE SERIALLY CONNECTED ACROSS SAID INPUT; AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT; A PAIR OF SIGNAL CONDUCTORS HAVING DISTRIBUTED CAPACITANCE THEREBETWEEN, ONE OF SAID CONDUCTORS CONNECTING SAID STORAGE CAPACITOR TO THE INPUT OF SAID AMPLIFIER FOR APPLYING THERETO THE SIGNAL APPEARING ON SAID STORAGE CAPACITOR WITH RESPECT TO THE REFERENCE POTENTIAL; SAID AMPLIFIER PRODUCING AN OUTPUT SIGNAL WHICH IS IN PHASE WITH THE SIGNAL APPLIED TO SAID INPUT AND WHICH HAS AN AMPLITUDE RELATED TO THE AMPLITUDE OF SIGNAL AT THE END OF SAID ONE CONDUCTOR CONNECTED TO THE INPUT OF SAID AMPLIFIER; MEANS INCLUDING THE OTHER OF THE SIGNAL CONDUCTORS CONNECTING THE OUTPUT OF SAID AMPLIFIER TO THE COMMON CONNECTION OF THE SERIALLY CONNECTED STORAGE CAPACITOR AND IMPEDANCE; AND A UTILIZATION CIRCUIT CONNECTED TO THE OUTPUT OF SAID AMPLIFIER.
Claim 2
Dependent Claim
153 words
SIGNALLING APPARATUS COMPRISING: AN INPUT FOR RECEIVING AN APPLIED SIGNAL WITH RESPECT TO A REFERENCE POTENTIAL; A STORAGE CAPACITOR AND AN IMPEDANCE SERIALLY CONNECTED ACROSS SAID INPUT; AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT; A PAIR OF SIGNAL CONDUCTORS HAVING DISTRIBUTED CAPACITANCE THEREBETWEEN, ONE OF SAID CONDUCTORS CONNECTING SAID STORAGE CAPACITOR TO THE INPUT OF SAID AMPLIFIER FOR APPLYING THERETO THE SIGNAL APPEARING ON SAID STORAGE CAPACITOR WITH RESPECT TO THE REFERENCE POTENTIAL; SAID AMPLIFIER PRODUCING AN OUTPUT SIGNAL WHICH IS IN PHASE WITH THE SIGNAL APPLIED TO SAID INPUT AND WHICH HAS AN AMPLITUDE RELATED TO THE AMPLITUDE OF SIGNAL AT THE END OF SAID ONE CONDUCTOR CONNECTED TO THE INPUT OF SAID AMPLIFIER; MEANS INCLUDING THE OTHER OF THE SIGNAL CONDUCTORS CONNECTING THE OUTPUT OF SAID AMPLIFIER TO THE COMMON CONNECTION OF THE SERIALLY CONNECTED STORAGE CAPACITOR AND IMPEDANCE; AND A UTILIZATION CIRCUIT CONNECTED TO THE OUTPUT OF SAID AMPLIFIER.
References Cited (Backward Citations)
US2795654A
Cited
US3229212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |