Patent US3328599A successfully refreshed from Google Patents.
US3328599A
Expired / Lapsed
US
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Comparator using differential amplifier means
Assignee: 3M Co
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Filing: 1964-01-10
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Granted: 1967-06-27
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Expires: 1984-01-10
Abstract
No abstract record available.
Inventors
- 👤 Timothy D Stupar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:47
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/24; H03K5/2409; H03K5/2418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A COMPARATOR FOR COMPARING THE AMPLITUDES OF A PAIR OF SIGNALS AND INDICATING WHICH HAS THE LARGEST AMPLITUDE, SAID COMPARATOR INCLUDING THE COMBINATION OF: A FIRST INPUT FOR RECEIVING THE FIRST OF THE SIGNALS AND A SECOND INPUT FOR RECEIVING THE SECOND OF THE SIGNALS, DIFFERENTIAL AMPLIFYING MEANS HAVING A PAIR OF PARALLEL CHANNELS, MEANS INTERCONNECTING THE FIRST OF THE CHANNELS WITH THE FIRST INPUT FOR SUPPLYING THE FIRST SIGNAL TO THE FIRST CHANNEL AND INTERCONNECTING THE SECOND CHANNEL WITH THE SECOND INPUT FOR SUPPLYING THE SECOND SIGNAL TO THE SECOND CHANNEL, SAID DIFFERENTIAL AMPLIFYING MEANS BEING EFFECTIVE TO AMPLIFY THE DIFFERENCE BETWEEN THE SIGNALS IN THE TWO CHANNELS, A PAIR OF OUTPUT, A SOURCE OF A REFERENCE POTENTIAL, A PAIR OF SWITCH MEANS INTERCONNECTED WITH THE TWO CHANNELS AND RESPONSIVE TO THE DIFFERENCE BETWEEN THE SIGNALS IN THE TWO CHANNELS, THE FIRST OF THE SWITCH MEANS BEING EFFECTIVE TO CONNECT THE FIRST OUTPUT WITH THE SOURCE OF REFERENCE POTENTIAL ONLY WHEN THE AMPLITUDE OF THE SIGNAL IN THE FIRST CHANNEL IS GREATER THAN THE AMPLITUDE OF THE SIGNAL IN THE SECOND CHANNEL, THE SECOND OF THE SWITCH MEANS BEING EFFECTIVE TO CONNECT THE SECOND OUTPUT WITH THE SOURCE OF REFERENCE POTENTIAL ONLY WHEN THE AMPLITUDE OF THE SIGNAL IN THE SECOND CHANNEL IS GREATER THAN THE AMPLITUDE OF THE SIGNAL IN THE FIRST CHANNEL.
Claim 2
Dependent Claim
225 words
A COMPARATOR FOR COMPARING THE AMPLITUDES OF A PAIR OF SIGNALS AND INDICATING WHICH HAS THE LARGEST AMPLITUDE, SAID COMPARATOR INCLUDING THE COMBINATION OF: A FIRST INPUT FOR RECEIVING THE FIRST OF THE SIGNALS AND A SECOND INPUT FOR RECEIVING THE SECOND OF THE SIGNALS, DIFFERENTIAL AMPLIFYING MEANS HAVING A PAIR OF PARALLEL CHANNELS, MEANS INTERCONNECTING THE FIRST OF THE CHANNELS WITH THE FIRST INPUT FOR SUPPLYING THE FIRST SIGNAL TO THE FIRST CHANNEL AND INTERCONNECTING THE SECOND CHANNEL WITH THE SECOND INPUT FOR SUPPLYING THE SECOND SIGNAL TO THE SECOND CHANNEL, SAID DIFFERENTIAL AMPLIFYING MEANS BEING EFFECTIVE TO AMPLIFY THE DIFFERENCE BETWEEN THE SIGNALS IN THE TWO CHANNELS, A PAIR OF OUTPUT, A SOURCE OF A REFERENCE POTENTIAL, A PAIR OF SWITCH MEANS INTERCONNECTED WITH THE TWO CHANNELS AND RESPONSIVE TO THE DIFFERENCE BETWEEN THE SIGNALS IN THE TWO CHANNELS, THE FIRST OF THE SWITCH MEANS BEING EFFECTIVE TO CONNECT THE FIRST OUTPUT WITH THE SOURCE OF REFERENCE POTENTIAL ONLY WHEN THE AMPLITUDE OF THE SIGNAL IN THE FIRST CHANNEL IS GREATER THAN THE AMPLITUDE OF THE SIGNAL IN THE SECOND CHANNEL, THE SECOND OF THE SWITCH MEANS BEING EFFECTIVE TO CONNECT THE SECOND OUTPUT WITH THE SOURCE OF REFERENCE POTENTIAL ONLY WHEN THE AMPLITUDE OF THE SIGNAL IN THE SECOND CHANNEL IS GREATER THAN THE AMPLITUDE OF THE SIGNAL IN THE FIRST CHANNEL.
References Cited (Backward Citations)
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US3025414A
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US3046487A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |