US3281697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter output transistor burnout protection
Assignee: Motorola Solutions Inc
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Filing: 1963-12-04
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Granted: 1966-10-25
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Expires: 1983-12-04
Abstract
No abstract record available.
Inventors
- 👤 Philip J Hansen
- 👤 Jr Walter F Walczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:03
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H02; H02H; H02H7/00; H02H7/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
214 words
IN A CARRIER WAVE TRANSMITTER, A TRANSISTOR AMPLIFIER CIRCUIT INCLUDING IN COMBINATION, A TRANSISTOR HAVING INPUT AND OUTPUT CIRCUIT MEANS, ANTENNA CIRCUIT MEANS, SAID OUTPUT CIRCUIT MEANS APPLYING FIRST SIGNALS TO SAID ANTENNA CIRCUIT MEANS FOR RADIATION THEREBY, AND SAID ANTENNA CIRCUIT MEANS BEING SUSCEPTIBLE TO PICKING UP SECOND SIGNALS FROM OTHER TRANSMITTERS WHICH MAY BE PRESENT AND APPLYING SAID SECOND SIGNALS TO SAID OUTPUT CIRCUIT MEANS, WHEREBY SAID FIRST AND SECOND SIGNALS ADD TO PRODUCE A VOLTAGE GREATER THAN THE BREAKDOWN VOLTAGE OF SAID TRANSISTOR, DRIVER MEANS, MEANS COUPLING SAID INPUT CIRCUIT MEANS TO SAID DRIVER MEANS FOR RECEIVING A DRIVER OUTPUT SIGNAL OF PREDETERMINED AMPLITUDE THEREFROM, SAID TRANSISTOR AMPLIFIER HAVING AN AVERAGE DIRECT CURRENT OUTPUT CURRENT THEREIN PROPORTIONAL TO SAID PREDETERMINED DRIVER OUTPUT SIGNAL AMPLITUDE, POWER SUPPLY MEANS, RESISTANCE MEANS COUPLING SAID POWER SUPPLY MEANS TO SAID OUTPUT CIRCUIT MEANS, SAID RESISTANCE MEANS BEING RESPONSIVE TO SAID AVERAGE OUTPUT CURRENT TO DEVELOP A CONTROL VOLTAGE, CURRENT CONTROL MEANS COUPLED TO SAID RESISTANCE MEANS AND SAID DRIVER MEANS FOR SUPPLYING CURRENT TO SAID DRIVER MEANS, SAID CURRENT CONTROL MEANS BEING RESPONSIVE TO SAID CONTROL VOLTAGE TO LIMIT THE CURRENT IN SAID DRIVER MEANS TO THEREBY CONTROL THE AMPLITUDE OF SAID DRIVER OUTPUT SIGNAL WHEREBY THE AVERAGE CURRENT IN SAID TRANSISTOR AMPLIFIER IS CONTROLLED.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |