USRE27804E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor-transistor logic circuits having improved voltage transfer characteristics
Assignee: —
•
Filing: 1971-01-21
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Granted: 1973-10-30
•
Expires: 1991-01-21
Abstract
Abstract TRANSISTOR-TRANSISTOR LOGIC (TTL) CIRCUITRY HAVING A BYPASS NETWORK CONNECTED TO THE OUTPUT DEVICE OF THE CIRCUITRY FOR PROVIDING TURN OFF DRIVE FOR THE OUTPUT DEVICE. THE BYPASS NETWORK INCLUDES A RESISTOR CONNECTED IN SERIES WITH AT LEAST ONE PN JUNCTION, AND SUCH PN JUNCTION IS WITHIN EITHER A SIMPLE DIODE OR A TRANSISTOR. THE BYPASS NETWORK PREVENTS UNDESIRABLE SPIKING IN THE OUTPUT SIGNAL OF THE TTL LOGIC CIRCUITRY.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |