US3195018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier
Assignee: AT&T Inc
•
Filing: 1961-09-27
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Granted: 1965-07-13
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Adolf J Giger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:04
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN AMPLIFIER FOR SIGNALS FROM A SOURCE OF SYMMETRICALLY VARYING SIGNAL ENERGY HAVING UNDESIRED SINGLE-SIDED COMPONENTS COMPRISING FIRST AND SECOND TRANSISTORS HAVING INPUT, OUTPUT, AND CONTROL ELECTRODES, A FIRST IMPEDANCE INTERCONNECTING SAID INPUT ELECTRODES, A SOURCE OF DIRECT CURRENT POTENTIAL WITH RESPECT TO GROUND CONNECTED TO THE OUTPUT ELECTRODE OF SAID FIRST TRANSISTOR, A SECOND IMPEDANCE CONNECTING THE OUTPUT ELECTRODE OF SAID SECOND TRANSISTOR TO GROUND, MEANS CONNECTING THE CONTROL ELECTRODES OF SAID TRANSISTORS TO RECEIVE SIGNALS FROM SAID SOURCE, SAID SOURCE COMPRISING TWO IMPEDANCE CONNECTED IN SERIES, TWO ASYMMETRICAL CONDUCTING MEANS CONNECTED IN SERIES AND TWO VOLTAGE SOURCES, MEANS CONNECTING SAID TWO SERIES IMPEDANCES IN PARALLEL WITH SAID TWO SERIES ASYMMETRICAL CONDUCTING MEANS, MEANS CONNECTING THE CONTROL ELECTRODE OF ONE TRANSISTOR TO ONE OF THE JUNCTIONS OF AN IMPEDANCE
Claim 2
Dependent Claim
130 words
AN AMPLIFIER FOR SIGNALS FROM A SOURCE OF SYMMETRICALLY VARYING SIGNAL ENERGY HAVING UNDESIRED SINGLE-SIDED COMPONENTS COMPRISING FIRST AND SECOND TRANSISTORS HAVING INPUT, OUTPUT, AND CONTROL ELECTRODES, A FIRST IMPEDANCE INTERCONNECTING SAID INPUT ELECTRODES, A SOURCE OF DIRECT CURRENT POTENTIAL WITH RESPECT TO GROUND CONNECTED TO THE OUTPUT ELECTRODE OF SAID FIRST TRANSISTOR, A SECOND IMPEDANCE CONNECTING THE OUTPUT ELECTRODE OF SAID SECOND TRANSISTOR TO GROUND, MEANS CONNECTING THE CONTROL ELECTRODES OF SAID TRANSISTORS TO RECEIVE SIGNALS FROM SAID SOURCE, SAID SOURCE COMPRISING TWO IMPEDANCE CONNECTED IN SERIES, TWO ASYMMETRICAL CONDUCTING MEANS CONNECTED IN SERIES AND TWO VOLTAGE SOURCES, MEANS CONNECTING SAID TWO SERIES IMPEDANCES IN PARALLEL WITH SAID TWO SERIES ASYMMETRICAL CONDUCTING MEANS, MEANS CONNECTING THE CONTROL ELECTRODE OF ONE TRANSISTOR TO ONE OF THE JUNCTIONS OF AN IMPEDANCE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |