US3303380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct coupled transistor amplifier having complementary symmetry output and switchable feedback loop for driving a deflection coil
Assignee: Unisys Corp
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Filing: 1963-11-08
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Granted: 1967-02-07
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Kozikowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3069; H03F3/3076; H03F3/34; H03F3/343; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/90; H03K6/00; H03K6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A MULTISTAGE DIRECT COUPLED TRANSISTOR AMPLIFIER FOR SUPPLYING CURRENT TO THE DEFLECTION COIL OF A CATHODE RAY TUBE COMPRISING (A) A TRANSISTOR OUTPUT STAGE INCLUDING A PAIR OF FIRST AND SECOND TRANSISTORS OF OPPOSITE CONDUCTIVITY HAVING THEIR EMITTER ELECTRODES INTERCONNECTED AND ADAPTED TO BE CONNECTED TO ONE END OF SAID DEFLECTION COIL, (B) AT LEAST ONE TRANSISTOR INPUT STAGE COUPLED TO THE BASE ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS, AND (C) A UNIDIRECTIONAL CIRCUIT MEANS CONNECTED BETWEEN SAID BASE ELECTRODES FOR APPLYING A DIFFERENCE IN POTENTIAL BETWEEN SAID BASE ELECTRODES WHICH IS GREATER THAN THE SUM OF THE FORWARD-BIASING BASE-EMITTER VOLTAGES OF SAID FIRST AND SECOND TRANSISTORS.
Claim 2
Dependent Claim
108 words
A MULTISTAGE DIRECT COUPLED TRANSISTOR AMPLIFIER FOR SUPPLYING CURRENT TO THE DEFLECTION COIL OF A CATHODE RAY TUBE COMPRISING (A) A TRANSISTOR OUTPUT STAGE INCLUDING A PAIR OF FIRST AND SECOND TRANSISTORS OF OPPOSITE CONDUCTIVITY HAVING THEIR EMITTER ELECTRODES INTERCONNECTED AND ADAPTED TO BE CONNECTED TO ONE END OF SAID DEFLECTION COIL, (B) AT LEAST ONE TRANSISTOR INPUT STAGE COUPLED TO THE BASE ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS, AND (C) A UNIDIRECTIONAL CIRCUIT MEANS CONNECTED BETWEEN SAID BASE ELECTRODES FOR APPLYING A DIFFERENCE IN POTENTIAL BETWEEN SAID BASE ELECTRODES WHICH IS GREATER THAN THE SUM OF THE FORWARD-BIASING BASE-EMITTER VOLTAGES OF SAID FIRST AND SECOND TRANSISTORS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |