Patent US3239833A successfully refreshed from Google Patents.
US3239833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logarithmic analog to digital converter
Assignee: General Precision Inc
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Filing: 1963-05-16
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Granted: 1966-03-08
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 John W Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A LOGARITHMIC ANALOG TO DIGITAL CONVERTER, COMPRISING, A PLURALITY OF FLIP-FLOPS CONSTITUTING A REGISTER, MEANS FOR SETTING SAID FLIP-FLOP SUCCESSIVELY FROM AN INITIAL RESET CONDITION, MEANS RESPONSIVE TO THE SETTING OF EACH OF THE FIRST OF A PREDETERMINED NUMBER OF SAID FLIP-FLOPS FOR SELECTING ONE OF A PLURALITY OF RESISTORS, THE NUMBER OF SAID RESISTORS BEING EQUAL TO THE NUMBER OF POSSIBLE COMBINATIONS OF THE CONDITIONS OF SAID FIRST PREDETERMINED NUMBER OF FLIP-FLOPS, EACH RESISTOR SO SELECTED BEING CONNECTED TO A VOLTAGE SOURCE THE VALUES OF SAID RESISTORS BEING CHOSEN TO CAUSE THE CURRENT FLOWING THERETHROUGH TO BE INDICATIVE OF AN EXPONENTIAL FUNCTION OF THE NUMBER INDICATED BY SAID REGISTER, MEANS RESPONSIVE TO THE SETTING OF EACH OF THE REMAINDER OF SAID FLIP-FLOPS FOR VARYING THE VOLTAGE OF SAID SOURCE APPROXIMATELY IN ACCORDANCE WITH SAID EXPONENTIAL FUNCTION, WHEREBY THE CURRENT THROUGGH THE SELECTED RESISTOR IS VARIED, MEANS FOR COMPARING THE CURRENT THROUGH THE CURRENTLY SELECTED RESISTOR WITH A CURRENT PROPORTIONAL TO MEANS OPERATED BY THE RESULT OF EACH COMPARISON FOR CONTROLLING THE CONDITION OF THE JUST PREVIOUSLY SET FLIP-FLOP.
Claim 2
Dependent Claim
179 words
A LOGARITHMIC ANALOG TO DIGITAL CONVERTER, COMPRISING, A PLURALITY OF FLIP-FLOPS CONSTITUTING A REGISTER, MEANS FOR SETTING SAID FLIP-FLOP SUCCESSIVELY FROM AN INITIAL RESET CONDITION, MEANS RESPONSIVE TO THE SETTING OF EACH OF THE FIRST OF A PREDETERMINED NUMBER OF SAID FLIP-FLOPS FOR SELECTING ONE OF A PLURALITY OF RESISTORS, THE NUMBER OF SAID RESISTORS BEING EQUAL TO THE NUMBER OF POSSIBLE COMBINATIONS OF THE CONDITIONS OF SAID FIRST PREDETERMINED NUMBER OF FLIP-FLOPS, EACH RESISTOR SO SELECTED BEING CONNECTED TO A VOLTAGE SOURCE THE VALUES OF SAID RESISTORS BEING CHOSEN TO CAUSE THE CURRENT FLOWING THERETHROUGH TO BE INDICATIVE OF AN EXPONENTIAL FUNCTION OF THE NUMBER INDICATED BY SAID REGISTER, MEANS RESPONSIVE TO THE SETTING OF EACH OF THE REMAINDER OF SAID FLIP-FLOPS FOR VARYING THE VOLTAGE OF SAID SOURCE APPROXIMATELY IN ACCORDANCE WITH SAID EXPONENTIAL FUNCTION, WHEREBY THE CURRENT THROUGGH THE SELECTED RESISTOR IS VARIED, MEANS FOR COMPARING THE CURRENT THROUGH THE CURRENTLY SELECTED RESISTOR WITH A CURRENT PROPORTIONAL TO MEANS OPERATED BY THE RESULT OF EACH COMPARISON FOR CONTROLLING THE CONDITION OF THE JUST PREVIOUSLY SET FLIP-FLOP.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |