Patent US3108231A successfully refreshed from Google Patents.
US3108231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance amplifier
Assignee: RCA Corp
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Filing: 1960-02-29
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Granted: 1963-10-22
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 David J Carlson
- 👤 Pan Wen Yuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:49
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03F3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
AN ELECTRIC CIRCUIT COMPRISING A FIRST AND A SECOND NEGATIVE RESISTANCE DEVICE; MEANS FOR BIASING SAID FIRST NEGATIVE RESISTANCE DEVICE SUCH THAT AN INCREASE IN FORWARD BIAS APPLIED TO SAID FIRST DEVICE CAUSES A CHANGE IN ONE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID DEVICE, AND A DECREASE IN THE FORWARD BIAS APPLIED TO SAID FIRST DEVICE CAUSES A CHANGE IN THE OPPOSITE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID FIRST DEVICE; MEANS FOR BIASING SAID SECOND NEGATIVE RESISTANCE DEVICE SUCH THAT A DECREASE IN FORWARD BIAS APPLIED TO SAID SECOND DEVICE CAUSES A CHANGE IN SAID ONE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID SECOND DEVICE, AND AN INCREASE IN THE FORWARD BIAS APPLIED TO SAID SECOND DEVICE CAUSES A CHANGE IN SAID OPPOSITE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID SECOND DEVICE; AND MEANS FOR COUPLING SAID FIRST NEGATIVE RESISTANCE DEVICE TO SAID SECOND NEGATIVE RESISTANCE DEVICE SO THAT A SIGNAL WAVE ACROSS SAID FIRST DEVICE CAUSES A CHANGE IN CONDUCTANCE IN SAID FIRST DEVICE WHICH IS SUBSTANTIALLY EQUAL IN MAGNITUDE BUT OPPOSITE IN DIRECTION TO THE CHANGE IN CONDUCTANCE THAT SAID SIGNAL WAVE CAUSES IN SAID SECOND DEVICE.
Claim 2
Dependent Claim
191 words
AN ELECTRIC CIRCUIT COMPRISING A FIRST AND A SECOND NEGATIVE RESISTANCE DEVICE; MEANS FOR BIASING SAID FIRST NEGATIVE RESISTANCE DEVICE SUCH THAT AN INCREASE IN FORWARD BIAS APPLIED TO SAID FIRST DEVICE CAUSES A CHANGE IN ONE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID DEVICE, AND A DECREASE IN THE FORWARD BIAS APPLIED TO SAID FIRST DEVICE CAUSES A CHANGE IN THE OPPOSITE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID FIRST DEVICE; MEANS FOR BIASING SAID SECOND NEGATIVE RESISTANCE DEVICE SUCH THAT A DECREASE IN FORWARD BIAS APPLIED TO SAID SECOND DEVICE CAUSES A CHANGE IN SAID ONE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID SECOND DEVICE, AND AN INCREASE IN THE FORWARD BIAS APPLIED TO SAID SECOND DEVICE CAUSES A CHANGE IN SAID OPPOSITE DIRECTION IN THE NEGATIVE RESISTANCE OF SAID SECOND DEVICE; AND MEANS FOR COUPLING SAID FIRST NEGATIVE RESISTANCE DEVICE TO SAID SECOND NEGATIVE RESISTANCE DEVICE SO THAT A SIGNAL WAVE ACROSS SAID FIRST DEVICE CAUSES A CHANGE IN CONDUCTANCE IN SAID FIRST DEVICE WHICH IS SUBSTANTIALLY EQUAL IN MAGNITUDE BUT OPPOSITE IN DIRECTION TO THE CHANGE IN CONDUCTANCE THAT SAID SIGNAL WAVE CAUSES IN SAID SECOND DEVICE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |