US3778734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current-limited gyrator
Assignee: Alcatel Lucent NV
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Filing: 1972-08-02
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Granted: 1973-12-11
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Expires: 1992-08-02
Abstract
Abstract There is described a current-limited gyrator having only two terminals. The gyrator includes a first transistor to supply a load, the base of the first transistor being coupled to its emitter circuit through a capacitor. A second transistor is coupled to the first transistor to limit the current supplied to the load by modifying the bias of the first transistor when the current to the load exceeds a predetermined value.
Inventors
- 👤 J Colardelle
- 👤 C Lerouge
- 👤 M Regbuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:55
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/40; H03H11/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A gyrator comprising: a first terminal; a second terminal; a first transistor of a given type having a base, an emitter and a collector, said collector being directly connected to said first terminal; a first resistor directly connected between said first terminal and said base of said first transistor; a power supply source directly connected to said first terminal; a second resistor directly connected to said emitter of said first transistor; a third resistor directly connected in series between said second resistor and said second terminal; a capacitor directly connected between said base of said first transistor and said second terminal; a load circuit directly connected to said second terminal; and a second transistor of a type equal to said given type being a base, an emitter and a collector, said base of said second transistor being directly connected to the junction between said second and third resistors, said emitter of said second transistor being directly connected to said second terminal and said collector of said second transistor being directly connected to said base of said first transistor.
Claim 2
Dependent Claim
178 words
A gyrator comprising: a first terminal; a second terminal; a first transistor of a given type having a base, an emitter and a collector, said collector being directly connected to said first terminal; a first resistor directly connected between said first terminal and said base of said first transistor; a power supply source directly connected to said first terminal; a second resistor directly connected to said emitter of said first transistor; a third resistor directly connected in series between said second resistor and said second terminal; a capacitor directly connected between said base of said first transistor and said second terminal; a load circuit directly connected to said second terminal; and a second transistor of a type equal to said given type being a base, an emitter and a collector, said base of said second transistor being directly connected to the junction between said second and third resistors, said emitter of said second transistor being directly connected to said second terminal and said collector of said second transistor being directly connected to said base of said first transistor.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |