Patent US3223992A successfully refreshed from Google Patents.
US3223992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current digital to analog decoder
Assignee: Individual
•
Filing: 1961-08-09
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Granted: 1965-12-14
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 John M Bentley
- 👤 James H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:28
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
AN ALTERNATING CURRENT DIGITAL TO ANALOG DECODER COMPRISING; AN ALTERNATING CURRENT REFERENCE VOLTAGE; A PHASE SWITCHING MEANS COUPLED TO SAID ALTERNATING CURRENT REFERENCE VOLTAGE TO APPLY AT AN OUTPUT THEREOF ONE OF TWO PHASES OF SAID ALTERNATING CURRENT VOLTAGE REFERENCE; A PLURALITY OF BINARY WEIGHTED RESISTORS COUPLED IN COMMON TO AN AMPLIFIER; A PLURALITY OF DIGIT SWITCH MEANS COUPLED IN COMMON TO THE OUTPUT OF SAID PHASE SWITCHING MEANS AND ONE EACH RESPECTIVELY TO ONE EACH OF SAID BINARY WEIGHTED RESISTORS; A PLURALITY OF SWITCH DRIVER MEANS ADAPTED TO HAVE THE INPUTS THEREOF COUPLED RESPECTIVELY TO STAGES OF BINARY DIGITAL OUTPUTS, ONE SWITCH DRIVER MEANS ADAPTED TO HAVE ITS INPUT COUPLED TO ONE BINARY DIGITAL OUTPUT STAGE AND ITS OUTPUT COUPLED TO CONTROL SAID PHASE SWITCHING MEANS AND THE REMAINING SWITCH DRIVER MEANS ADAPTED TO HAVE THEIR INPUTS COUPLED TO ONE EACH BINARY DIGITAL OUTPUT AND THEIR OUTPUTS COUPLED RESPECTIVELY TO ONE EACH DIGIT SWITCH MEANS WHEREBY SAID BINARY WEIGHTED RESISTORS HAVE ALTERNATING CURRENT APPLIED THERETO IN THE SELECTED ORDER AND PHASE BY SAID SWITCH DRIVER MEANS AND DIGIT SWITCH MEANS PRODUCE ON THE OUTPUT OF SAID AMPLIFIER AN ANALOG ALTERNATING CURRENT VOLTAGE REPRESENTATIVE OF A BINARY COMPUTER DIGITAL COMBINATION INPUT.
Claim 2
Dependent Claim
201 words
AN ALTERNATING CURRENT DIGITAL TO ANALOG DECODER COMPRISING; AN ALTERNATING CURRENT REFERENCE VOLTAGE; A PHASE SWITCHING MEANS COUPLED TO SAID ALTERNATING CURRENT REFERENCE VOLTAGE TO APPLY AT AN OUTPUT THEREOF ONE OF TWO PHASES OF SAID ALTERNATING CURRENT VOLTAGE REFERENCE; A PLURALITY OF BINARY WEIGHTED RESISTORS COUPLED IN COMMON TO AN AMPLIFIER; A PLURALITY OF DIGIT SWITCH MEANS COUPLED IN COMMON TO THE OUTPUT OF SAID PHASE SWITCHING MEANS AND ONE EACH RESPECTIVELY TO ONE EACH OF SAID BINARY WEIGHTED RESISTORS; A PLURALITY OF SWITCH DRIVER MEANS ADAPTED TO HAVE THE INPUTS THEREOF COUPLED RESPECTIVELY TO STAGES OF BINARY DIGITAL OUTPUTS, ONE SWITCH DRIVER MEANS ADAPTED TO HAVE ITS INPUT COUPLED TO ONE BINARY DIGITAL OUTPUT STAGE AND ITS OUTPUT COUPLED TO CONTROL SAID PHASE SWITCHING MEANS AND THE REMAINING SWITCH DRIVER MEANS ADAPTED TO HAVE THEIR INPUTS COUPLED TO ONE EACH BINARY DIGITAL OUTPUT AND THEIR OUTPUTS COUPLED RESPECTIVELY TO ONE EACH DIGIT SWITCH MEANS WHEREBY SAID BINARY WEIGHTED RESISTORS HAVE ALTERNATING CURRENT APPLIED THERETO IN THE SELECTED ORDER AND PHASE BY SAID SWITCH DRIVER MEANS AND DIGIT SWITCH MEANS PRODUCE ON THE OUTPUT OF SAID AMPLIFIER AN ANALOG ALTERNATING CURRENT VOLTAGE REPRESENTATIVE OF A BINARY COMPUTER DIGITAL COMBINATION INPUT.
References Cited (Backward Citations)
US3019426A
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 |