UST957007I4
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-mode logic circuitry with improved input/output characteristics
Assignee: International Business Machines Corp
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Filing: 1976-07-30
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Granted: 1977-04-05
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Expires: 1996-07-30
Abstract
Abstract coupling of signals between Large Scale Integrated Circuit chips is facilitated by provision of an emitter follower output stage for the chip. Special input circuits are also provided. The logic circuits may be DTL or Schottky TTL. The special input circuit may be a DTL type or a CTL (complementary transistor logic) type. Pull down resistors may be employed with the emitter follower output driver and the special DTL input circuit.
Inventors
- 👤 Paul V. Jordan
- 👤 Robert F. Sechler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/0175; H03K19/018; H03K19/01825
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |