US3864584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed programmable driver circuit
Assignee: International Business Machines Corp
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Filing: 1973-11-29
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Granted: 1975-02-04
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Expires: 1993-11-29
Abstract
Abstract A programmable driver circuit includes a constant current generator, a switching circuit and first and second hot carrier diodes connected to first and second limit voltages to control turn-on and turn-off delay in the switching circuit within predetermined tolerances. A current mode switch is used in the input circuit to control the switching circuit and a complementary emitter follower circuit is connected as an output circuit to supply the necessary load current.
Inventors
- 👤 David J Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:58
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H03K6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A circuit, for controlling turn-on and turn-off delays of a digital switching circuit, comprising: means for generating a constant current; a first hot carrier diode connected between said constant current generator means and a first limit voltage; a second hot carrier diode connected to a second limit voltage for establishing a second voltage limit; switch means connected to said second hot carrier diode and to a first element of a third hot carrier diode which has a second element thereof connected to a junction of said constant current generator and said first hot carrier diode; wherein said first hot carrier diode establishes a first voltage limit for an output signal and said second hot carrier diode establishes a second voltage limit for said output signal, and wherein said first and second hot carrier diodes control circuit turn-on and turn-off delays within predetermined limits.
Claim 2
Dependent Claim
143 words
A circuit, for controlling turn-on and turn-off delays of a digital switching circuit, comprising: means for generating a constant current; a first hot carrier diode connected between said constant current generator means and a first limit voltage; a second hot carrier diode connected to a second limit voltage for establishing a second voltage limit; switch means connected to said second hot carrier diode and to a first element of a third hot carrier diode which has a second element thereof connected to a junction of said constant current generator and said first hot carrier diode; wherein said first hot carrier diode establishes a first voltage limit for an output signal and said second hot carrier diode establishes a second voltage limit for said output signal, and wherein said first and second hot carrier diodes control circuit turn-on and turn-off delays within predetermined limits.
References Cited (Backward Citations)
US3573502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |