F.m. to p.a.m. converter
Abstract
Abstract A CIRCUIT FOR ACCEPTING FREQUENCY MODULATED (F.M) INPUT WHEREIN THE INFORMATION RESIDES IN THE SPACINGS BETWEEN ZERO-AXIS CROSSINGS OF THE CYCLES, AND CONVERTING THIS INFORMATION INTO PULSE AMPLITUDE MODULATION P.A.M. OUTPUT HAVING FLAT STEP LEVELS EACH OF WHICH REPRESENTS THE SPACING BETWEEN ONE PAIR OF ADJACENT ZERO-AXIS CROSSINGS, THE CIRCUIT HAVING THE ADVANTAGE OF PROVIDING AN ACCURATE OUTPUT LEVEL FOR EACH HALF CYCLE OF THE F.M. INPUT. THE STEP LEVELS ARE OBTAINED BY LINEARLY CHARGING A CAPACITOR FROM A D.C. SOURCE, EACH CHARGE ACCUMULATING SUBSTANTIALLY FOR THE DURATION OF THE HALF-CYCLE IN QUESTION, AND THE CIRCUIT THEN SAMPLING AND HOLDING THE LEVEL OF THE CAPACITOR WHILE THE NEXT F.M. HALF-CYCLE IS BEING USED TO RECHARGE THE CAPACITOR TO ACCUMULATE A NEW LEVEL REPRESENTING ITS DURATION.
Inventors
- 👤 Alfred Bugay
Bibliographic Details
Claims Analysis
Total Claims: 0References 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 |