US3303489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to log-analog converter
Assignee: Individual
•
Filing: 1962-05-17
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Granted: 1967-02-07
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Krucoff Darwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A DIGITAL TO LOG-ANALOG CONVERTER COMPRISING: FIRST MEANS FOR TRANSLATING A DIGITAL INPUT NUMBER INTO A FIXED POINT PORTION AND A POWER OF A RADIX; SECOND MEANS RESPONSIVE TO A SET OF SIGNALS REPRESENTING SAID POWER FOR PRODUCING A MAJOR BASE CHARACTERISTIC SIGNAL CORRESPONDING TO THE CHARACTERISTIC OF A LOGARITHM TO SAID RADIX; THIRD MEANS FOR TRANSLATING SAID FIXED POINT PORTION TO A LOGARITHMIC MANTISSA BASED ALSO ON SAID RADIX; AND FOURTH MEANS FOR COMBINING SAID MAJOR BASE CHARACTERISTIC AND SAID LOGARITHMIC MANTISSA TO PRODUCE A LOG-ANALOG OF SAID DIGITAL INPUT NUMBER.
Claim 2
Dependent Claim
92 words
A DIGITAL TO LOG-ANALOG CONVERTER COMPRISING: FIRST MEANS FOR TRANSLATING A DIGITAL INPUT NUMBER INTO A FIXED POINT PORTION AND A POWER OF A RADIX; SECOND MEANS RESPONSIVE TO A SET OF SIGNALS REPRESENTING SAID POWER FOR PRODUCING A MAJOR BASE CHARACTERISTIC SIGNAL CORRESPONDING TO THE CHARACTERISTIC OF A LOGARITHM TO SAID RADIX; THIRD MEANS FOR TRANSLATING SAID FIXED POINT PORTION TO A LOGARITHMIC MANTISSA BASED ALSO ON SAID RADIX; AND FOURTH MEANS FOR COMBINING SAID MAJOR BASE CHARACTERISTIC AND SAID LOGARITHMIC MANTISSA TO PRODUCE A LOG-ANALOG OF SAID DIGITAL INPUT NUMBER.
References 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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |