US3272996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal limiter
Assignee: RCA Corp
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Filing: 1959-12-31
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Granted: 1966-09-13
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Expires: 1979-12-31
Abstract
No abstract record available.
Inventors
- 👤 Pan Wen Yuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:40
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A SIGNAL LIMITING CIRCUIT COMPRISING A SEMICONDUCTOR TUNNEL DIODE HAVING AN OPERATING CHARACTERISTIC WITH POSITIVE CONDUCTANCE AND NEGATIVE CONDUCTANCE PORTIONS, MEANS FOR APPLYING SIGNALS TO SAID DIODE, MEANS FOR BIASING SAID DIODE TO OPERATE AT A SELECTED NEGATIVE CONDUCTANCE VALUE IN THE ABSENCE OF APPLIED SIGNALS, RESISTIVE MEANS EFFECTIVELY COUPLED IN PARALLEL WITH SAID DIODE, SAID RESISTIVE MEANS HAVING A RESISTANCE VALUE RELATIVE TO THAT OF THE NEGATIVE RESISTANCE OF SAID DIODE TO PRESENT IN COMBINATION WITH SAID DIODE A HIGH SHUNT POSITIVE IMPEDANCE TO SAID APPLIED SIGNALS HAVING AN AMPLITUDE BELOW A SELECTED VALUE AND TO ATTENUATE SAID APPLIED SIGNALS ABOVE SAID SELECTED VALUE SUBSTANTIALLY TO SAID SELECTED VALUE, AND AUTOMATIC GAIN CONTROL MEANS COUPLED TO SAID DIODE FOR CHANGING THE BIAS APPLIED TO SAID DIODE AS A FUNCTION OF THE AMPLITUDE OF THE SIGNALS APPLIED TO SAID DIODE.
Claim 2
Dependent Claim
140 words
A SIGNAL LIMITING CIRCUIT COMPRISING A SEMICONDUCTOR TUNNEL DIODE HAVING AN OPERATING CHARACTERISTIC WITH POSITIVE CONDUCTANCE AND NEGATIVE CONDUCTANCE PORTIONS, MEANS FOR APPLYING SIGNALS TO SAID DIODE, MEANS FOR BIASING SAID DIODE TO OPERATE AT A SELECTED NEGATIVE CONDUCTANCE VALUE IN THE ABSENCE OF APPLIED SIGNALS, RESISTIVE MEANS EFFECTIVELY COUPLED IN PARALLEL WITH SAID DIODE, SAID RESISTIVE MEANS HAVING A RESISTANCE VALUE RELATIVE TO THAT OF THE NEGATIVE RESISTANCE OF SAID DIODE TO PRESENT IN COMBINATION WITH SAID DIODE A HIGH SHUNT POSITIVE IMPEDANCE TO SAID APPLIED SIGNALS HAVING AN AMPLITUDE BELOW A SELECTED VALUE AND TO ATTENUATE SAID APPLIED SIGNALS ABOVE SAID SELECTED VALUE SUBSTANTIALLY TO SAID SELECTED VALUE, AND AUTOMATIC GAIN CONTROL MEANS COUPLED TO SAID DIODE FOR CHANGING THE BIAS APPLIED TO SAID DIODE AS A FUNCTION OF THE AMPLITUDE OF THE SIGNALS APPLIED TO SAID DIODE.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |