Patent US2389920A successfully refreshed from Google Patents.
Patent US3195065A successfully refreshed from Google Patents.
US3195065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature stabilization of transistor amplifiers
Assignee: Statham Instruments Inc
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Filing: 1963-06-26
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Granted: 1965-07-13
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 Earl W Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:09
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN AMPLIFIER COMPRISING A DRIVER TRANSISTOR STAGE AND AN OUTPUT TRANSISTOR, SAID DRIVEN STAGE CONNECTED IN A COMMON EMITTER CONFIGURATION, A TRANSISTOR CONNECTED IN A COMMON COLLECTOR CONFIGURATION, THE BASE OF THE COMMON COLLECTOR TRANSISTOR DIRECTLY COUPLED TO THE COLLECTOR OF THE DRIVER TRANSISTOR, SAID OUTPUT TRANSISTOR COUPLED TO SAID COMMON COLLECTOR TRANSISTOR, POWER INPUT TERMINALS CONNECTED TO THE EMITTERS AND COLLECTORS OF SAID TRANSISTORS, MEANS TO APPLY A SIGNAL TO THE BASE OF THE DRIVER TRANSISTOR, A VOLTAGE DIVIDER TEMPERATURE COMPENSATING NETWORK COUPLED TO SAID EMITTERS AND COLLECTORS AND TO SAID POWER TERMINALS, ONE LEG OF SAID NETWORK COMPRISING A SOLID STATE DIODE HAVING A TEMPERATURE RESISTANCE CHARACTERISTIC OF THE SAME KINE AS THE TEMPERATURE CHARACTERISTICS OF RESISTANCE OF SAID TRANSISTORS, AND A RESISTOR WHOSE RESISTANCE DOES NOT CHANGE SUBSTANTIALLY WITH TEMPERATURE CONNECTED IN SERIES WITH SAID DIODE, AND THE OTHER LEG OF SAID DIODE HAVING A RESISTOR WHOSE
Claim 2
Dependent Claim
150 words
AN AMPLIFIER COMPRISING A DRIVER TRANSISTOR STAGE AND AN OUTPUT TRANSISTOR, SAID DRIVEN STAGE CONNECTED IN A COMMON EMITTER CONFIGURATION, A TRANSISTOR CONNECTED IN A COMMON COLLECTOR CONFIGURATION, THE BASE OF THE COMMON COLLECTOR TRANSISTOR DIRECTLY COUPLED TO THE COLLECTOR OF THE DRIVER TRANSISTOR, SAID OUTPUT TRANSISTOR COUPLED TO SAID COMMON COLLECTOR TRANSISTOR, POWER INPUT TERMINALS CONNECTED TO THE EMITTERS AND COLLECTORS OF SAID TRANSISTORS, MEANS TO APPLY A SIGNAL TO THE BASE OF THE DRIVER TRANSISTOR, A VOLTAGE DIVIDER TEMPERATURE COMPENSATING NETWORK COUPLED TO SAID EMITTERS AND COLLECTORS AND TO SAID POWER TERMINALS, ONE LEG OF SAID NETWORK COMPRISING A SOLID STATE DIODE HAVING A TEMPERATURE RESISTANCE CHARACTERISTIC OF THE SAME KINE AS THE TEMPERATURE CHARACTERISTICS OF RESISTANCE OF SAID TRANSISTORS, AND A RESISTOR WHOSE RESISTANCE DOES NOT CHANGE SUBSTANTIALLY WITH TEMPERATURE CONNECTED IN SERIES WITH SAID DIODE, AND THE OTHER LEG OF SAID DIODE HAVING A RESISTOR WHOSE
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) | 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 |