Ac/dc converter
Abstract
Abstract A CONVERTER FOR RECEIVING AUDIO FREQUENCY ALTERNATING CURRENT SIGNALS AND PRODUCING A DIRECT CURRENT OUTPUT SIGNAL PROPORTIONAL TO THE AC SIGNAL IN RESPONSE THERETO. AN OPERATIONAL AMPLIFIER IS DIRECT CONNECTED TO RECEIVE THE AC SIGNAL AND IS PROVIDED WITH A FEEDBACK ARRANGEMENT IN A BOOTSTRAPPING CONFIGURATION. THE OUTPUT OF THE BOOTSTRAPPED OPERATIONAL AMPLIFIER IS APPLIED THROUGH A COUPLING CAPACITOR TO A SECOND OPERATIONAL AMPLIFIER THAT MAY HAVE A DESIRED GAIN GREATER THAN UNITY. THE SIGNAL THUS APPLIED AT THE INPUT OF THE CONVERTER IS UTILIZED BY THE FIRST OPERATIONAL AMPLIFIER TO DRIVE THE CAPACITOR COUPLING SUCCEEDING STAGES, THE OUTPUT OF THE SECOND OPERATIONAL AMPLIFIER IS RECTIFIED AND INTEGRATED TO PRODUCE A DC ANALOGUE QUANTITY PROPORTIONAL TO THE AC AUDIO FREQUENCY AMPLITUDE APPLIED TO THE CONVERTER. D R A W I N G
Inventors
- 👤 Richard E Gadberry
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |