Signal conversion systems with storage and correction of quantization error
Abstract
Abstract DIGITAL TO ANALOG AND SAMPLE-HOLD CIRCUITS IN WHICH CONVERSION OR QUANTIZATION ERROR GENERATED IN EACH SAMPLING OR CONVERSION INTERVAL IS STORED AND ADDED TO THE NEXT CONSECUTIVE INPUT SIGNAL FOR CONVERSION THEREWITH. THE DIGITAL TO ANALOG CONVERTER INCLUDES A CONVENTIONAL CONVERTER HAVING A CAPACITY OF N BITS, FOR CONVERSION OF THE N MOST SIGNIFICANT BITS OF AN N+I BIT INPUT SIGNAL. THE I UNCONVERTED BITS ARE ADDED IN A FULL ADDER TO THE NEXT DIGITAL INPUT. THE SAMPLE-HOLD DEVICE INCLUDES APPARATUS DIGITAL INPUT. THE SAMPLE-HOLD DEVICE INCLUDES APPARATUS SAMPLED OUTPUT AND THE ANALOG INPUT SIGNAL DURING A FIRST SAMPLING INTERVAL. THE INTEGRATED VALUE IS THEN ADDED TO THE ANALOG INPUT SIGNAL DURING THE NEXT SAMPLING INTERVAL.
Inventors
- 👤 Takeo Miura
- 👤 Junzo Iwata
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) | 1974-02-01 | 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 |