Patent US4095127A successfully refreshed from Google Patents.
US4095127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor base drive regulator
Assignee: Rohr Inc
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Filing: 1976-03-29
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Granted: 1978-06-13
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Expires: 1996-03-29
Abstract
Abstract A base drive regulator for a transistor operation in a switching mode comprising a series transistor regulator between the source of drive voltage and the base of the switching transistor and a diode with its anode element connected to the base of the series transistor regulator and its cathode connected to the collector of the switching transistor. The material used for construction of the switching transistor, series regulator transistor and the diode has similar electrical characteristics.
Inventors
- 👤 Arne Nerem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:47
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/04; H03K17/042; H03K17/0422
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
A base drive regulator for a first transistor having base, emitter and collector elements, which comprises, (a) a source of base drive voltage, (b) active single element regulator means for controlling said first transistor; said regulator means connected between said source and said base element of said first transistor, (c) said regulator means including an additional transistor having a base, emitter and collector and responsive to said source and directly connected to said base of first transistor for supplying drive voltage to said base of said first transistor and, (d) resistive bi-directional means connected between the emitter and collector of said additional transistor for maintaining a bias voltage on said base of said first transistor of a value above the normal voltage on said base of said first transistor when said additional transistor responsive to said source is non-conducting and a drive voltage is present, and (e) a diode connected between the base of said additional transistor and the collector element of the first transistor so as to maintain a substantially zero differential voltage between said collector element and said base element of said first transistor.
Claim 2
Dependent Claim
186 words
A base drive regulator for a first transistor having base, emitter and collector elements, which comprises, (a) a source of base drive voltage, (b) active single element regulator means for controlling said first transistor; said regulator means connected between said source and said base element of said first transistor, (c) said regulator means including an additional transistor having a base, emitter and collector and responsive to said source and directly connected to said base of first transistor for supplying drive voltage to said base of said first transistor and, (d) resistive bi-directional means connected between the emitter and collector of said additional transistor for maintaining a bias voltage on said base of said first transistor of a value above the normal voltage on said base of said first transistor when said additional transistor responsive to said source is non-conducting and a drive voltage is present, and (e) a diode connected between the base of said additional transistor and the collector element of the first transistor so as to maintain a substantially zero differential voltage between said collector element and said base element of said first transistor.
Claim 3
Dependent Claim
37 words
The invention as defined in claim 1, wherein said diode has an anode and a cathode, said anode connected to the base of said additional transistor and its cathode connected to the collector of said first transistor.
Claim 4
Dependent Claim
25 words
The invention as defined in claim 1, wherein said first transistor, additional transistor and diode are constructed from material having substantially the same electrical characteristics.
Claim 5
Dependent Claim
12 words
The invention as defined in claim 3, wherein said material is silicon.
Claim 6
Dependent Claim
15 words
The invention as defined in claim 1, wherein said resistive bi-directional means is a resistor.
References Cited (Backward Citations)
US2887542A
Cited
US3566158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |