US3223993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-linear digital-to-analog converter
Assignee: Lanteris Space LLC
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Filing: 1961-10-30
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Granted: 1965-12-14
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert S Dahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:06
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A NON-LINEAR DIGITAL-TO-ANALOG CONVERTER, COMPRISING: A LINEAR DIGITAL-TO-ANALOG CONVERTER HAVING SUBSTANTIALLY CONSTANT INTERNAL IMPEDANCE AND ADAPTED TO PRODUCE AN ANALOG SIGNAL LINEARLY RELATED TO AN APPLIED BINARY DIGITAL SIGNAL; A TWO-TERMINAL RESISTANCE NETWORK CONNECTED ACROSS THE OUTPUT OF SAID CONVERTER, SAID NETWORK COMPRISING A PLURALITY OF SIGNAL PATHS CONNECTED IN SHUNT BETWEEN SAID TWO TERMINALS AND CORRESPONDING RESPECTIVELY TO THE THE DIGITS OF SAID APPLIED BINARY SIGNAL, EACH OF SIGNAL PATHS INCLUDING A SERIES COMBINATION OF A RESISTOR AND A SWITCH OPERATED BY SAID APPLIED BINARY SIGNAL, SAID RESISTORS HAVING THE RESPECTIVE FIXED VALUES R, 2R, 22R ... 2NR, N BEING ONE LESS THAN THE NUMBER OF DIGITS IN SAID APPLIED BINARY SIGNAL, EACH OF SAID SWITCHES BEING CLOSED OR OPENED ACCORDING TO WHETHER THE CORRESPONDING DIGIT OF SAID BINARY SIGNAL IS ZERO OR ONE, THEREBY TO CONVERT SAID ANALOG SIGNAL TO ONE WHICH IS NON-LINEARLY RELATED TO SAID APPLIED SIGNAL; AND A LOAD CONNECTED BETWEEN SAID TWO TERMINALS OF SAID NETWORK.
Claim 2
Dependent Claim
162 words
A NON-LINEAR DIGITAL-TO-ANALOG CONVERTER, COMPRISING: A LINEAR DIGITAL-TO-ANALOG CONVERTER HAVING SUBSTANTIALLY CONSTANT INTERNAL IMPEDANCE AND ADAPTED TO PRODUCE AN ANALOG SIGNAL LINEARLY RELATED TO AN APPLIED BINARY DIGITAL SIGNAL; A TWO-TERMINAL RESISTANCE NETWORK CONNECTED ACROSS THE OUTPUT OF SAID CONVERTER, SAID NETWORK COMPRISING A PLURALITY OF SIGNAL PATHS CONNECTED IN SHUNT BETWEEN SAID TWO TERMINALS AND CORRESPONDING RESPECTIVELY TO THE THE DIGITS OF SAID APPLIED BINARY SIGNAL, EACH OF SIGNAL PATHS INCLUDING A SERIES COMBINATION OF A RESISTOR AND A SWITCH OPERATED BY SAID APPLIED BINARY SIGNAL, SAID RESISTORS HAVING THE RESPECTIVE FIXED VALUES R, 2R, 22R ... 2NR, N BEING ONE LESS THAN THE NUMBER OF DIGITS IN SAID APPLIED BINARY SIGNAL, EACH OF SAID SWITCHES BEING CLOSED OR OPENED ACCORDING TO WHETHER THE CORRESPONDING DIGIT OF SAID BINARY SIGNAL IS ZERO OR ONE, THEREBY TO CONVERT SAID ANALOG SIGNAL TO ONE WHICH IS NON-LINEARLY RELATED TO SAID APPLIED SIGNAL; AND A LOAD CONNECTED BETWEEN SAID TWO TERMINALS OF SAID NETWORK.
References Cited (Backward Citations)
US2839744A
Cited
US2892147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |