Direct current or alternate current converter having variable pulse width and frequency
Abstract
Abstract A DC TO AC INVERTER INCLUDES A FIRST PAIR OF COMPLEMENTARY TRANSISTORS HAVING THEIR RESPECTIVE COLLECTOREMITTER CIRCUITS COUPLED IN SERIES WITH AN INDUCTIVE LOAD. THE SECOND PAIR OF COMPLEMENTARY TRANSISTORS SIMILARLY HAVE THEIR COLLECTOR-EMITTER CIRCUITS COUPLED IN SERIES WITH THE LOAD. OF THE RESPECTIVE PAIR, BOTH FIRST TYPE TRANSISTORS HAVE THEIR COLLECTOR-EMITTER CIRCUITS COUPLED TO A DC SOURCE TERMINAL AND BOTH SECOND TYPE TRANSISTORS HAVE THEIR COLLECTOR-EMITTER CIRCUITS COUPLED TO THE OTHER DC SOURCE TERMINAL. THE BASES OF THE FIRST TYPE TRANSISTORS ARE NOW SIMULTANEOUSLY DRIVEN BY AN INDEPENDENT OSCILLATOR CIRCUIT TO EFFECT THE CONVERSION. TWO TYPES OF OSCILLATOR CIRCUITS ARE SHOWN. THE FIRST INCLUDES AN RC COUPLED OSCILLATOR OF VARIABLE FREQUENCY, AND THE SECOND A RELAXATION OSCILLATOR IN TANDEM WITH A TYPICAL OSCILLATOR CIRCUIT TO FORM A VARIABLE PULSE WIDTH OSCILLATOR.
Inventors
- 👤 Lawrence M Weixelman
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |