US3840805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring parameters of resonant lc-circuit
Assignee: Individual
•
Filing: 1973-06-01
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Granted: 1974-10-08
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Expires: 1993-06-01
Abstract
Abstract A device for measuring the parameters of a resonant LC circuit. The device includes a D.C. amplifier with a parallel negative feedback whose circuit includes a reference element or parallel LC-elements of a resonent LC-circuit. Connected to the input of the amplifier via series-connected LC-elements of the resonant LC-circuit or reference element is a reference voltage pickup. Connected to the output of the amplifier are amplitude and frequency measuring units whose output signals are used to determine the parameters of the resonant LC-circuit elements.
Inventors
- 👤 A Martyashin
- 👤 A Morozov
- 👤 E Shakhov
- 👤 V Shlyandin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:25
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A device for measuring the parameters of a resonant LCcircuit including series-connected elements, said device comprising a DC amplifier including parallel negative feedback means including a reference element connected in negative feedback relation with said amplifier; said Amplifier including an input and output; a reference voltage pickup including an output connected via said series-connected LC-elements of the resonant LC-circuit to the input of said DC amplifier; an amplitude measuring means connected to the output of said amplifier; and a frequency measuring means connected to the output of said amplifier, the output signals of the frequency measuring means together with those of said amplitude measuring means determining the parameters of the resonant LC-circuit.
Claim 2
Independent Claim
112 words
A device for measuring the parameters of a resonant LCcircuit including series-connected elements, said device comprising a DC amplifier including parallel negative feedback means including a reference element connected in negative feedback relation with said amplifier; said Amplifier including an input and output; a reference voltage pickup including an output connected via said series-connected LC-elements of the resonant LC-circuit to the input of said DC amplifier; an amplitude measuring means connected to the output of said amplifier; and a frequency measuring means connected to the output of said amplifier, the output signals of the frequency measuring means together with those of said amplitude measuring means determining the parameters of the resonant LC-circuit.
Claim 3
Dependent Claim
14 words
A device as claimed in claim 1, wherein said reference element is a resistor.
Claim 4
Dependent Claim
14 words
A device as claimed in claim 1 wherein said reference element is a capacitor.
Claim 5
Dependent Claim
15 words
A device as claimed in claim 1 wherein said reference element is an inductance coil.
Claim 6
Independent Claim
111 words
A device for measuring the parameters of a resonant LC-circuit including parallel LC-elements, said device comprising a DC amplifier including parallel negative feedback means including the parallel LC-elements of the resonant LC-circuit; said amplifier including an input and an output; a reference voltage pickup for being electrically connected to the input of said DC amplifier; a reference element connecting said amplifier to said reference voltage pickup; an amplitude measuring units connected to the output of said amplifier; a frequency measuring means also connected to the output of said amplifier, the output signals of said frequency measuring means with those of said amplitude measuring means determining the parameters of the resonant LC-circuit.
Claim 7
Independent Claim
111 words
A device for measuring the parameters of a resonant LC-circuit including parallel LC-elements, said device comprising a DC amplifier including parallel negative feedback means including the parallel LC-elements of the resonant LC-circuit; said amplifier including an input and an output; a reference voltage pickup for being electrically connected to the input of said DC amplifier; a reference element connecting said amplifier to said reference voltage pickup; an amplitude measuring units connected to the output of said amplifier; a frequency measuring means also connected to the output of said amplifier, the output signals of said frequency measuring means with those of said amplitude measuring means determining the parameters of the resonant LC-circuit.
Claim 8
Dependent Claim
14 words
A device as claimed in claim 5, wherein said reference element is a resistor.
Claim 9
Dependent Claim
14 words
A device as claimed in claim 5, wherein said reference element is a capacitor.
Claim 10
Dependent Claim
15 words
A device as claimed in claim 5, wherein said reference element is an inductance coil.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |