Patent US3914628A successfully refreshed from Google Patents.
US3914628A
Expired / Lapsed
US
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T-T-L driver circuitry
Assignee: Raytheon Co
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Filing: 1974-05-13
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Granted: 1975-10-21
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Expires: 1994-05-13
Abstract
Abstract Improved T-T-L driver circuitry is disclosed to provide a pair of complementary signals at the outputs of a pair of output stages, each one of such stages having a totem pole, or active pull-up, transistor arrangement. Also disclosed are networks which enable the driver circuitry to respond to a standby or inhibit signal.
Inventors
- 👤 Henry C Pao
- 👤 Stephen A Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:44
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/15; H03K5/151
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
155 words
Driver circuitry comprising: a. phase splitter means for developing complementary signals at a pair of output terminals, such means including: i. a coupling transistor, the emitter electrode thereof for connection to a binary signal source; and, ii. an emitter follower transistor having: a. base electrode connected to the collector electrode of such coupling transistor; an emitter electrode connected to one of the pair of output terminals, and, a collector electrode connected to the other one of the pair of output terminals; and, b. a pair of output stages, each one thereof coupled to said emitter follower transistor at a different one of the pair of output terminals, each one of such stages including a pair of transistors arranged in an active pull-up configuration, the base electrode of one of the pair of transistors in each one of the stages being connected to a different one of such pair of output terminals through only passive elements.
Claim 2
Dependent Claim
155 words
Driver circuitry comprising: a. phase splitter means for developing complementary signals at a pair of output terminals, such means including: i. a coupling transistor, the emitter electrode thereof for connection to a binary signal source; and, ii. an emitter follower transistor having: a. base electrode connected to the collector electrode of such coupling transistor; an emitter electrode connected to one of the pair of output terminals, and, a collector electrode connected to the other one of the pair of output terminals; and, b. a pair of output stages, each one thereof coupled to said emitter follower transistor at a different one of the pair of output terminals, each one of such stages including a pair of transistors arranged in an active pull-up configuration, the base electrode of one of the pair of transistors in each one of the stages being connected to a different one of such pair of output terminals through only passive elements.
Claim 3
Dependent Claim
37 words
The driver circuitry recited in claim 1 including additionally a network, such network having an input terminal for connection to a standby signal source and an output terminal connected to an electrode of said emitter follower transistor.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |