Digital-to-analog converter with smooth recovery
Abstract
Abstract A FLOATING POINT NUMBER DIGITAL-TO-ANALOG CONVERTER IS DISCLOSED IN WHICH HE SEQUENTIAL MANTISSAS AS CONVERTED AND EXPONENT CHANGES SIGNALLING MANTISSA JUMPS ARE USED TO MULTIPLY OR DIVIDE THE MANTISSAS TO ELIMINATE DISCONTINUITIES. SUBSEQUENTLY THE ANALOG OUTPUT IS EXPANDED OR COMPRESSED BY GRADUAL GAIN CHANGE IN THE ANALOG OUTPUT. WHEN A GAIN CHANGE LIMIT HAS BEEN REACHED, THE GAIN IS STEP-FUNCTION CHANGED IN THE REVERSE, CONCURRING WITH A DIGITAL ARITHMETIC STEP ELIMINATING THE PREVIOUS ONE WHICH OCCURED WHEN THERE WAS AN EXPONENT CHANGE. THE GRADUAL GAIN CHANGE IS CONTROLLED BY SEPARATE FEEDBACK THROUGH A FINE RESOLUTION COUNTER. AS THE GRADUAL GAIN CHANGE IS RELATIVELY SLOW, SUDDEN SIGNAL "BURST-OUTS" ARE NOT ELIMINATED. THE DIGITAL SIGNAL MAY BE A MULTIPLEXED ONE, WITH DEMULTIPLEXING OCCURRING AT THE ANALOG OUTPUT.
Inventors
- 👤 David Henry Hartke
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |