US3927368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of breaking electric networks for measurement of parameters of network components
Assignee: Gdańsk University of Technology
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Filing: 1974-04-04
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Granted: 1975-12-16
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Expires: 1994-04-04
Abstract
Abstract A method for creating ''''virtual'''' open circuitry in electric networks for the purpose of measuring the parameters of individual network components with either D.C. or A.C. methods of measurement. The method provides the possibility of a full or partial isolation of an element from a network, thus eliminating the shunting effect of the network. The method may be used for the automatic checking of parameters of passive and active components of electronic systems and installations. The circuit consists of a voltage follower whose amplification factor is close to a unity, said follower having a very high input impedance. The cathode follower is appropriately connected to adjacent network vertices which are connected with a junction of the components to be measured through a branch to be broken in order to provide isolation.
Inventors
- 👤 Romuald Zielonko
- 👤 Jerzy Hoja
- 👤 Henryk Wojciechowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:11
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G01; G01R; G01R27/00; G01R27/02; G01R31/00; G01R31/28; G01R31/2832; G01R31/2836; G01R31/2843; G01R31/317
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A method of isolating a network impedance element connected between two terminals in said network, said method comprising creating a virtual open circuit in said electrical network by transmitting a potential at one of said terminals by means of a high-input-impedance voltage follower whose amplification factor is close to unity to the other terminal.
Claim 2
Independent Claim
54 words
A method of isolating a network impedance element connected between two terminals in said network, said method comprising creating a virtual open circuit in said electrical network by transmitting a potential at one of said terminals by means of a high-input-impedance voltage follower whose amplification factor is close to unity to the other terminal.
Claim 3
Independent Claim
87 words
A method of measuring in situ a parameter of an electrical component which forms part of an electrical network having interconnected branches constituted by impedance elements connected to said components, said meThod comprising applying a parameter-measuring device in parallel with said component and creating a virtual open circuit in each of the branches of the network which are connected to said component, said virtual open circuit being effected by connecting a high input impedance voltage follower of substantially unity gain in parallel with one of said branches.
Claim 4
Independent Claim
87 words
A method of measuring in situ a parameter of an electrical component which forms part of an electrical network having interconnected branches constituted by impedance elements connected to said components, said meThod comprising applying a parameter-measuring device in parallel with said component and creating a virtual open circuit in each of the branches of the network which are connected to said component, said virtual open circuit being effected by connecting a high input impedance voltage follower of substantially unity gain in parallel with one of said branches.
Claim 5
Dependent Claim
59 words
A network comprising first and second impedance elements connected to each other, and a cathode follower of high input impedance and substantially unity gain coupled across one of said impedance elements whereby the latter constitutes a virtual open circuit permitting electrical measurements to be taken of the other of said elements as though no other element were connected thereto.
Claim 6
Dependent Claim
59 words
A network comprising first and second impedance elements connected to each other, and a cathode follower of high input impedance and substantially unity gain coupled across one of said impedance elements whereby the latter constitutes a virtual open circuit permitting electrical measurements to be taken of the other of said elements as though no other element were connected thereto.
Claim 7
Dependent Claim
15 words
A network as claimed in claim 3 comprising measuring means connected to said other element.
References Cited (Backward Citations)
US3411081A
Cited
US3702970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |