Patent US3952258A successfully refreshed from Google Patents.
US3952258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parellel-connection of semiconductor systems with an arrangement for preventing thermal instability
Assignee: US Philips Corp
•
Filing: 1975-04-11
•
Granted: 1976-04-20
•
Expires: 1995-04-11
Abstract
Abstract The invention describes how semiconductor configurations can be connected in parallel so as to prevent thermal instability. For this purpose each output transistor has the strongest thermal coupling with a driver transistor other than that to which it is electrically coupled, preferably that electrical coupling which is thermally weakest.
Inventors
- 👤 Walter Henricus Maria Magdala Smulders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:18
CPC Classifications
H; H10; H10D; H10D89/00; H10D89/10; H10D89/105; H03; H03F; H03F1/00; H03F1/30; H03F1/302; H03F3/00; H03F3/68
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
An amplifier arrangement which at least in respect of the d.c. setting consists of a multiplicity of parallel branches, each of which comprises at least a driver and an output transistor, an output of each driver transistor being individually electrically coupled to the input of the output transistor, characterized in that the transistors are geometrically arranged so that each output transistor has the strongest thermal coupling with a driver transistor other than that with which it is electrically coupled, and preferably has the weakest coupling with that driver transistor with which it is electrically coupled.
Claim 2
Dependent Claim
95 words
An amplifier arrangement which at least in respect of the d.c. setting consists of a multiplicity of parallel branches, each of which comprises at least a driver and an output transistor, an output of each driver transistor being individually electrically coupled to the input of the output transistor, characterized in that the transistors are geometrically arranged so that each output transistor has the strongest thermal coupling with a driver transistor other than that with which it is electrically coupled, and preferably has the weakest coupling with that driver transistor with which it is electrically coupled.
Claim 3
Dependent Claim
32 words
An amplifier arrangement as claimed in claim 1, characterized in that the electrical coupling between said driver transistor and its associated output transistor is such that these transistors form a cascode arrangement.
Claim 4
Dependent Claim
29 words
An amplifier arrangement as claimed in claim 1, characterized in that said driver transistor and its associated output transistor are electrically coupled so as to form a Darlington arrangement.
Claim 5
Dependent Claim
21 words
An amplifier arrangement as claimed in claim 1, characterized in that the arrangement takes the form of a monolithic integrated circuit.
Claim 6
Dependent Claim
24 words
An amplifier arrangement as claimed in claim 4, characterized in that the output transistors are cyclically offset relative to the electrically associated driver transistors.
References Cited (Backward Citations)
US3667064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |