US3403265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated tunnel diode voltage comparator circuit
Assignee: Westinghouse Electric Corp
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Filing: 1964-10-21
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Granted: 1968-09-24
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Otto L Apfelbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
A COMPARATOR CIRCUIT COMPRISING AN OUTPUT TUNNEL DIODE HAVING A CHARACTERISTIC PEAK CURRENT SWITCHING VALUE AND COUPLED WITH AN OUTPUT, DIFFERENCE CURRENT CIRCUIT MEANS CONNECTED TO SUPPLY A DIFFERENCE CURRENT TO SAID OUTPUT TUNNEL DIODE, BIAS CURRENT CIRCUIT MEANS ENERGIZED BY A SUITABLE ENERGY SOURCE AND CONNECTED TO SUPPLY A BIAS CURRENT TO SAID OUTPUT TUNNEL DIODE, SAID BIAS CURRENT CIRCUIT MEANS INCLUDING ANOTHER TUNNEL DIODE HAVING ANOTHER CHARACTERISTIC PEAK CURRENT SWITCHING VALUE LESS THAN THAT OF SAID OUTPUT TUNNEL DIODE, SAID TUNNEL DIODES HAVING SAID PEAK CURRENT VALUES MATCHED OVER A PREDETERMINED TEMPERATURE RANGE SO THAT SAID PEAK CURRENT VALUES VARY SUBSTANTIALLY EQUALLY WITH TEMPERATURE CHANGE WITHIN SAID TEMPERATURE RANGE, SAID BIAS CURRENT CIRCUIT MEANS FURTHER INCLUDING TUNNEL DIODE VOLTAGE AND CURRENT CONTROLLING MEANS SO AS TO PROVIDE FOR GENERATING A BIAS CURRENT IN EXCESS OF THE PEAK CURRENT VALUE OF SAID BIAS CIRCUIT TUNNEL DIODE AND IN EXCESS OF RESPECTIVE HOLDING CURRENT VALUES OF SAID TUNNEL DIODES AFTER SAID TUNNEL DIODES HAVE BEEN SWITCHED BUT LESS THAN THE PEAK CURRENT VALUE OF SAID OUTPUT TUNNEL DIODE, SAID VOLTAGE AND CURRENT CONTROLLING MEANS INCLUDING RESISTANCE MEANS CONNECTED SERIALLY BETWEEN SAID BIAS CIRCUIT TUNNEL DIODE AND SAID ENERGY SOURCE AND FURTHER INCLUDING A VOLTAGE LIMITING DIODE CONNECTED IN A PATH WHICH IS PARALLEL TO A PATH IN WHICH SAID TUNNEL DIODES ARE CONNECTED.
Claim 2
Dependent Claim
223 words
A COMPARATOR CIRCUIT COMPRISING AN OUTPUT TUNNEL DIODE HAVING A CHARACTERISTIC PEAK CURRENT SWITCHING VALUE AND COUPLED WITH AN OUTPUT, DIFFERENCE CURRENT CIRCUIT MEANS CONNECTED TO SUPPLY A DIFFERENCE CURRENT TO SAID OUTPUT TUNNEL DIODE, BIAS CURRENT CIRCUIT MEANS ENERGIZED BY A SUITABLE ENERGY SOURCE AND CONNECTED TO SUPPLY A BIAS CURRENT TO SAID OUTPUT TUNNEL DIODE, SAID BIAS CURRENT CIRCUIT MEANS INCLUDING ANOTHER TUNNEL DIODE HAVING ANOTHER CHARACTERISTIC PEAK CURRENT SWITCHING VALUE LESS THAN THAT OF SAID OUTPUT TUNNEL DIODE, SAID TUNNEL DIODES HAVING SAID PEAK CURRENT VALUES MATCHED OVER A PREDETERMINED TEMPERATURE RANGE SO THAT SAID PEAK CURRENT VALUES VARY SUBSTANTIALLY EQUALLY WITH TEMPERATURE CHANGE WITHIN SAID TEMPERATURE RANGE, SAID BIAS CURRENT CIRCUIT MEANS FURTHER INCLUDING TUNNEL DIODE VOLTAGE AND CURRENT CONTROLLING MEANS SO AS TO PROVIDE FOR GENERATING A BIAS CURRENT IN EXCESS OF THE PEAK CURRENT VALUE OF SAID BIAS CIRCUIT TUNNEL DIODE AND IN EXCESS OF RESPECTIVE HOLDING CURRENT VALUES OF SAID TUNNEL DIODES AFTER SAID TUNNEL DIODES HAVE BEEN SWITCHED BUT LESS THAN THE PEAK CURRENT VALUE OF SAID OUTPUT TUNNEL DIODE, SAID VOLTAGE AND CURRENT CONTROLLING MEANS INCLUDING RESISTANCE MEANS CONNECTED SERIALLY BETWEEN SAID BIAS CIRCUIT TUNNEL DIODE AND SAID ENERGY SOURCE AND FURTHER INCLUDING A VOLTAGE LIMITING DIODE CONNECTED IN A PATH WHICH IS PARALLEL TO A PATH IN WHICH SAID TUNNEL DIODES ARE CONNECTED.
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |