US3210670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demodulator apparatus employing a tunnel diode
Assignee: Westinghouse Electric Corp
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Filing: 1961-03-30
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Granted: 1965-10-05
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Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Wesley N Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:40
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/08; H03D1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A SIGNAL DEMODULATOR COMPRISING A TUNNEL DIODE HAVING A VVOLTAGE-CURRENT CHARACTERISTIC WITH A FIRST AND A SECOND POSITIVE CONDUCTANCE PORTION JOINED BY A NEGATIVE CONDUCTING PORTION, SIGNAL CIRCUIT MEANS INCLUDING A RESISTOR HAVING A POSITIVE SUBSTANTIALLY LINEAR CHARACTERISTIC CONNECTED TO SAID TUNNEL DIODE FOR APPLYING ACROSS THE LATTER AN ALTERNATING CURRENT SIGNAL TO BE DETECTED ADDITIONAL CIRCUIT MEANS INCLUDING SAID RESISTOR FOR APPLYING A BIASING POTENTIAL TO BIAS SAID DIODE AT THE LOWER EXTREMITY OF SAID NEGATIVE CONDUCTANCE PORTION ADJACENT SAID SECOND POSITIVE CONDUCTANCE PORTION OF SAID VOLTAGECURRENT CHARACTERISTIC, LOW PASS FILTER MEANS CONNECTED TO SAID TUNNEL DIODE, AND LOAD MEANS OPERATIVELY CONNECTED TO SAID LOW PASS FILTER MEANS WHEREBY AN ALTERNATION OF ONE POLARITY OF THE SIGNAL CAUSES A SMALL CHANGE IN THE CURRENT IN SAID DIODE AND SUBSTANTIALLY NO SIGNAL TO BE DEVELOPED IN SAID LOAD MEANS, AND AN ALTERNATION OF THE OPPOSITE POLARITY OF THE SIGNAL CAUSES A CHANGE IN THE CURRENT THROUGH SAID TUNNEL DIODE LARGE RELATIVE TO THE CHANGE IN CURRENT IN THE OPPOSITE DIRECTION AND CAUSING A SUBSTANTIAL SIGNAL IN SAID LOAD MEANS.
Claim 2
Dependent Claim
179 words
A SIGNAL DEMODULATOR COMPRISING A TUNNEL DIODE HAVING A VVOLTAGE-CURRENT CHARACTERISTIC WITH A FIRST AND A SECOND POSITIVE CONDUCTANCE PORTION JOINED BY A NEGATIVE CONDUCTING PORTION, SIGNAL CIRCUIT MEANS INCLUDING A RESISTOR HAVING A POSITIVE SUBSTANTIALLY LINEAR CHARACTERISTIC CONNECTED TO SAID TUNNEL DIODE FOR APPLYING ACROSS THE LATTER AN ALTERNATING CURRENT SIGNAL TO BE DETECTED ADDITIONAL CIRCUIT MEANS INCLUDING SAID RESISTOR FOR APPLYING A BIASING POTENTIAL TO BIAS SAID DIODE AT THE LOWER EXTREMITY OF SAID NEGATIVE CONDUCTANCE PORTION ADJACENT SAID SECOND POSITIVE CONDUCTANCE PORTION OF SAID VOLTAGECURRENT CHARACTERISTIC, LOW PASS FILTER MEANS CONNECTED TO SAID TUNNEL DIODE, AND LOAD MEANS OPERATIVELY CONNECTED TO SAID LOW PASS FILTER MEANS WHEREBY AN ALTERNATION OF ONE POLARITY OF THE SIGNAL CAUSES A SMALL CHANGE IN THE CURRENT IN SAID DIODE AND SUBSTANTIALLY NO SIGNAL TO BE DEVELOPED IN SAID LOAD MEANS, AND AN ALTERNATION OF THE OPPOSITE POLARITY OF THE SIGNAL CAUSES A CHANGE IN THE CURRENT THROUGH SAID TUNNEL DIODE LARGE RELATIVE TO THE CHANGE IN CURRENT IN THE OPPOSITE DIRECTION AND CAUSING A SUBSTANTIAL SIGNAL IN SAID LOAD MEANS.
References Cited (Backward Citations)
US2966599A
Cited
US3075088A
Cited
US3119072A
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US3134949A
Cited
US3061786A
Cited
US2978576A
Cited
US3119080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |