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US3553565A
Expired / Lapsed
US
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Difference amplifier having a reference voltage source
Assignee: US Philips Corp
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Filing: 1967-12-27
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Granted: 1971-01-05
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Expires: 1987-12-27
Abstract
Abstract A REGULATING CIRCUIT FOR CONTROLLING THE OUTPUT VOLTAGE OF A GENERATOR IN ACCORDANCE WITH THE AMBIENT TEMPERATURE OF A LOAD. THE NEGATIVE TEMPERATURE COEFFICIENT OF THE BASE-EMITTER THRESHOLD VOLTAGE IS USED AS A VOLTAGE COMPARISON STANDARD IN A DIFFERENCE AMPLIFIER CONTROLLING THE FLOW OF CURRENT TO THE FIELD WINDING OF THE GENERATOR.
Inventors
- 👤 Willem Ebbinge
- 👤 Johannes Gerardus Wouterus Bom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |