Patent US3079566A successfully refreshed from Google Patents.
US3079566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier
Assignee: US Philips Corp
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Filing: 1958-11-25
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Granted: 1963-02-26
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Expires: 1978-11-25
Abstract
No abstract record available.
Inventors
- 👤 Ebbinge Wilem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:24
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; H03F1/00; H03F1/30; H03F1/302; H03F1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A CASCADE TRANSISTOR AMPLIFIER COMPRISING A PLURALITY OF TRANSISTOR STAGES, THE LAST TRANSISTOR OF THE CASCADE BEING CONNECTED IN COMMON COLLECTOR CONNECTION, A LOAD IMPEDANCE IN THE EMITTER CIRCUIT OF SAID LAST TRANSISTOR, A SOURCE OF FILTERED SUPPLY VOLTAGE HAVING AT LEAST TWO OUTPUTS WITH DIFFERENT DEGREES OF FILTERING, THE COLLECTOR OF THE LAST TRANSISTOR BEING CONNECTED TO A RELATIVELY UNFILTERED OUTPUT OF SAID SOURCE, THE BASE OF SAID LAST TRANSISTOR BEING DIRECTCURRENT CONDUCTIVELY CONNECTED TO THE COLLECTOR OF A SECOND TRANSISTOR OF SAID CASCADE THROUGH THE EMITTER AND BASE OF A PRECEDING TRANSISTOR CONNECTED IN COMMON COLLECTOR CONFIGURATION, MEANS FOR SUPPLYING AN INPUT SIGNAL TO THE EMITTER-BASE CIRCUIT OF SAID SECOND TRANSISTOR, THE COLLECTOR OF THE PRECEDING TRANSISTOR BEING CONNECTED TO SAID RELATIVELY UNFILTERED OUTPUT OF SAID SOURCE, THE COLLECTOR OF THE SECOND TRANSISTOR BEING CONNECTED TO A RELATIVELY FILTERED OUTPUT OF SAID SOURCE, AND A RESISTOR AND THE RELATIVELY FILTERED OUTPUT, SAID RESISTOR HAVING A VALVE SUCH THAT THE DIRECT-VOLTAGE DROP ACROSS THE LOAD IMPEDANCE IS SUBSTANTIALLY ONE-HALF THE RELATIVELY UNFILTERED VOLTAGE OF SAID SOURCE.
Claim 2
Dependent Claim
177 words
A CASCADE TRANSISTOR AMPLIFIER COMPRISING A PLURALITY OF TRANSISTOR STAGES, THE LAST TRANSISTOR OF THE CASCADE BEING CONNECTED IN COMMON COLLECTOR CONNECTION, A LOAD IMPEDANCE IN THE EMITTER CIRCUIT OF SAID LAST TRANSISTOR, A SOURCE OF FILTERED SUPPLY VOLTAGE HAVING AT LEAST TWO OUTPUTS WITH DIFFERENT DEGREES OF FILTERING, THE COLLECTOR OF THE LAST TRANSISTOR BEING CONNECTED TO A RELATIVELY UNFILTERED OUTPUT OF SAID SOURCE, THE BASE OF SAID LAST TRANSISTOR BEING DIRECTCURRENT CONDUCTIVELY CONNECTED TO THE COLLECTOR OF A SECOND TRANSISTOR OF SAID CASCADE THROUGH THE EMITTER AND BASE OF A PRECEDING TRANSISTOR CONNECTED IN COMMON COLLECTOR CONFIGURATION, MEANS FOR SUPPLYING AN INPUT SIGNAL TO THE EMITTER-BASE CIRCUIT OF SAID SECOND TRANSISTOR, THE COLLECTOR OF THE PRECEDING TRANSISTOR BEING CONNECTED TO SAID RELATIVELY UNFILTERED OUTPUT OF SAID SOURCE, THE COLLECTOR OF THE SECOND TRANSISTOR BEING CONNECTED TO A RELATIVELY FILTERED OUTPUT OF SAID SOURCE, AND A RESISTOR AND THE RELATIVELY FILTERED OUTPUT, SAID RESISTOR HAVING A VALVE SUCH THAT THE DIRECT-VOLTAGE DROP ACROSS THE LOAD IMPEDANCE IS SUBSTANTIALLY ONE-HALF THE RELATIVELY UNFILTERED VOLTAGE OF SAID SOURCE.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |