Patent US3275848A successfully refreshed from Google Patents.
US3275848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistable circuit
Assignee: Digital Equipment Corp
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Filing: 1963-09-19
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Granted: 1966-09-27
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Bell Chester Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:09
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/29; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/0823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
AN ELECTRONIC CIRCUIT COMPRISING (A) AT LEAST THREE LOGIC CIRCUITS, EACH OF WHICH (1) HAS A PLURALITY OF INPUR TERMINALS NOT EXCEEDING THE NUMBER OF LOGIC CIRCUITS AND AN OUTPUT TERMINAL, (2) DEVELOPS A SECOND-LEVEL OUTPUT SIGNAL ONLY WHEN ALL SAID INPUT TERMINALS RECEIVE FIRST-LEVEL SIGNALS, (3) DEVELOPS SAID FIRST-LEVEL SIGNAL AT ITS OUTPUT TERMINAL WHEN ANY ONE OR MORE OF SAID INPUT TERMINALS RECEIVERS A SECOND-LEVEL SIGNAL, (4) HAS ITS OUTPUT TERMINAL CONNECTED TO AN INPUT TERMINAL OF EACH OF THE OTHER LOGIC CIRCUITS SO THAT EACH INPUT TERMINAL OF EACH LOGIC CIRCUIT IS CONNECTED TO AN OUTPUT TERMINAL OF ANOTHER DIFFERENT LOGIC CIRCUIT, AND (5) IS ARRANGED TO DEVELOP A HIGHER OUTPUT IMPEDANCE AT ITS OUTPUT TERMINAL WHEN IT DEVELOPS SAID FIRST-LEVEL SIGNAL THAN WHEN IT DEVELOPS SAID SECOND-LEVEL SIGNAL, (B) WHEREBY IN RESPONSE TO APPLICATION OF AN INPUT SIGNAL OF SAID SECOND LEVEL TO A FIRST OUTPUT TERMINAL AND, ALTERNATIVELY, APPLICATION OF AN INPUT SIGNAL OF SAID FIRST LEVEL TO ALL OUTPUT TERMINALS EXCEPT SAID FIRST ONE, SAID CIRCUIT DEVELOPS AT SAID FIRST OUTPUT TERMINAL A PERSISTING SECOND-LEVEL SIGNAL AND CONSTRAINS THE SIGNALS AT THE OTHER OUTPUT TERMINALS TO SAID FIRST LEVEL.
Claim 2
Dependent Claim
195 words
AN ELECTRONIC CIRCUIT COMPRISING (A) AT LEAST THREE LOGIC CIRCUITS, EACH OF WHICH (1) HAS A PLURALITY OF INPUR TERMINALS NOT EXCEEDING THE NUMBER OF LOGIC CIRCUITS AND AN OUTPUT TERMINAL, (2) DEVELOPS A SECOND-LEVEL OUTPUT SIGNAL ONLY WHEN ALL SAID INPUT TERMINALS RECEIVE FIRST-LEVEL SIGNALS, (3) DEVELOPS SAID FIRST-LEVEL SIGNAL AT ITS OUTPUT TERMINAL WHEN ANY ONE OR MORE OF SAID INPUT TERMINALS RECEIVERS A SECOND-LEVEL SIGNAL, (4) HAS ITS OUTPUT TERMINAL CONNECTED TO AN INPUT TERMINAL OF EACH OF THE OTHER LOGIC CIRCUITS SO THAT EACH INPUT TERMINAL OF EACH LOGIC CIRCUIT IS CONNECTED TO AN OUTPUT TERMINAL OF ANOTHER DIFFERENT LOGIC CIRCUIT, AND (5) IS ARRANGED TO DEVELOP A HIGHER OUTPUT IMPEDANCE AT ITS OUTPUT TERMINAL WHEN IT DEVELOPS SAID FIRST-LEVEL SIGNAL THAN WHEN IT DEVELOPS SAID SECOND-LEVEL SIGNAL, (B) WHEREBY IN RESPONSE TO APPLICATION OF AN INPUT SIGNAL OF SAID SECOND LEVEL TO A FIRST OUTPUT TERMINAL AND, ALTERNATIVELY, APPLICATION OF AN INPUT SIGNAL OF SAID FIRST LEVEL TO ALL OUTPUT TERMINALS EXCEPT SAID FIRST ONE, SAID CIRCUIT DEVELOPS AT SAID FIRST OUTPUT TERMINAL A PERSISTING SECOND-LEVEL SIGNAL AND CONSTRAINS THE SIGNALS AT THE OTHER OUTPUT TERMINALS TO SAID FIRST LEVEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |