US3329950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Unisys Corp
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Filing: 1963-06-28
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Granted: 1967-07-04
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Philip E Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:21
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A MULTI-STAGE, LINEAR AMPLIFYING, SUCCESSIVE COMPARISON, ANALOG TO DIGITAL CONVERTER IN WHICH EACH STAGE COMPRISES: A FIRST INVERTING AMPLIFIER HAVING DISCONTINUOUS NEGATIVE FEEDBACK MEANS, A SECOND INVERTING SUMMING AMPLIFIER AND A VOLTAGE REFERENCE RECEIVING MEANS, SAID FIRST AND SECOND AMPLIFIERS HAVING A PAIR OF INPUT TERMINALS AND A PAIR OF OUTPUT TERMINALS, SAID INPUT TERMINALS OF BOTH AMPLIFIERS TO RECEIVE A BIPOLAR STAGE INPUT ANALOG VOLTAGE, THE OUTPUT TERMINALS OF SAID FIRST AND SAID SECOND AMPLIFIERS TO PRODUCE THE DIGITAL AND ANALOG OUTPUT VOLTAGE SIGNALS FROM SAID STAGE, FURTHER INTERCONNECTING MEANS BETWEEN THE DISCONTINUOUS NEGATIVE FEEDBACK MEANS OF SAID FIRST AMPLIFIER AND THE SECOND AMPLIFIER INPUT TERMINALS, SAID SECOND AMPLIFIER INPUT TERMINALS ALSO CONNECTED TO SAID VOLTAGE REFERENCE RECEIVING MEANS, SAID STAGE TO THEREBY PROVIDE A BINARY OUTPUT INDICATION FROM SAID FIRST AMPLIFIER OUTPUT CORRESPONDING TO THE POLARITY OF SAID BIPOLAR INPUT ANALOG SIGNAL AND PROVIDING FURTHER A BIPOLAR ANALOG OUTPUT VOLTAGE FROM SAID SECOND AMPLIFIER HAVING TWICE THE RATE OF CHANGE OF THE INPUT ANALOG VOLTAGE WHILE MAINTAINING THE SAME AMPLITUDE RANGE AND REFERENCE.
Claim 2
Dependent Claim
175 words
A MULTI-STAGE, LINEAR AMPLIFYING, SUCCESSIVE COMPARISON, ANALOG TO DIGITAL CONVERTER IN WHICH EACH STAGE COMPRISES: A FIRST INVERTING AMPLIFIER HAVING DISCONTINUOUS NEGATIVE FEEDBACK MEANS, A SECOND INVERTING SUMMING AMPLIFIER AND A VOLTAGE REFERENCE RECEIVING MEANS, SAID FIRST AND SECOND AMPLIFIERS HAVING A PAIR OF INPUT TERMINALS AND A PAIR OF OUTPUT TERMINALS, SAID INPUT TERMINALS OF BOTH AMPLIFIERS TO RECEIVE A BIPOLAR STAGE INPUT ANALOG VOLTAGE, THE OUTPUT TERMINALS OF SAID FIRST AND SAID SECOND AMPLIFIERS TO PRODUCE THE DIGITAL AND ANALOG OUTPUT VOLTAGE SIGNALS FROM SAID STAGE, FURTHER INTERCONNECTING MEANS BETWEEN THE DISCONTINUOUS NEGATIVE FEEDBACK MEANS OF SAID FIRST AMPLIFIER AND THE SECOND AMPLIFIER INPUT TERMINALS, SAID SECOND AMPLIFIER INPUT TERMINALS ALSO CONNECTED TO SAID VOLTAGE REFERENCE RECEIVING MEANS, SAID STAGE TO THEREBY PROVIDE A BINARY OUTPUT INDICATION FROM SAID FIRST AMPLIFIER OUTPUT CORRESPONDING TO THE POLARITY OF SAID BIPOLAR INPUT ANALOG SIGNAL AND PROVIDING FURTHER A BIPOLAR ANALOG OUTPUT VOLTAGE FROM SAID SECOND AMPLIFIER HAVING TWICE THE RATE OF CHANGE OF THE INPUT ANALOG VOLTAGE WHILE MAINTAINING THE SAME AMPLITUDE RANGE AND REFERENCE.
References Cited (Backward Citations)
US2660618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |