US3184609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor gated switching circuit having high input impedance and low attenuation
Assignee: Unisys Corp
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Filing: 1962-08-27
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Granted: 1965-05-18
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Yee Seening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:14
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A SERIES SWITCHING CIRCUIT COMPRISING IN COMBINATION, A THREE-TERMINAL TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, A SOURCE OF SWITCHING CONTROL SIGNAL COUPLED TO SAID BASE FOR CONTROLLING THE CONDUCTION OF SAID TRANSISTOR, A SOURCE OF SIGNALS TO BE SAMPLED COUPLED TO ONE OF THE OTHER OF SAID TERMINALS OF THE TRANSISTOR AND BEING OF A POLARITY OF FORWARD BIAS THE CONDUCTION PATH BETWEEN SAID ONE TERMINAL AND BASE, A LOAD COUPLED TO THE REMAINING TERMINAL OF SAID TRANSISTOR, A SOURCE OF SUBSTANTIALLY CONSTANT CURRENT COUPLED TO SAID REMAINING TERMINAL AND BEING A POLARITY OF FORWARD BIAS THE CONDUCTION PATH BETWEEN SAID REMAINING TERMINAL AND BASE, THE POLARITIES AND MAGNITUDES OF THE POTENTIALS OF SAID
Claim 2
Dependent Claim
117 words
A SERIES SWITCHING CIRCUIT COMPRISING IN COMBINATION, A THREE-TERMINAL TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, A SOURCE OF SWITCHING CONTROL SIGNAL COUPLED TO SAID BASE FOR CONTROLLING THE CONDUCTION OF SAID TRANSISTOR, A SOURCE OF SIGNALS TO BE SAMPLED COUPLED TO ONE OF THE OTHER OF SAID TERMINALS OF THE TRANSISTOR AND BEING OF A POLARITY OF FORWARD BIAS THE CONDUCTION PATH BETWEEN SAID ONE TERMINAL AND BASE, A LOAD COUPLED TO THE REMAINING TERMINAL OF SAID TRANSISTOR, A SOURCE OF SUBSTANTIALLY CONSTANT CURRENT COUPLED TO SAID REMAINING TERMINAL AND BEING A POLARITY OF FORWARD BIAS THE CONDUCTION PATH BETWEEN SAID REMAINING TERMINAL AND BASE, THE POLARITIES AND MAGNITUDES OF THE POTENTIALS OF SAID
References Cited (Backward Citations)
US2718613A
Cited
US3078378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |