US3440554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential dc amplifier
Assignee: Texas Instruments Tucson Corp
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Filing: 1966-09-14
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Granted: 1969-04-22
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Expires: 1986-09-14
Abstract
No abstract record available.
Inventors
- 👤 Donald R Mcgraw
- 👤 Jerald G Graeme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:28
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03F3/45484; H03F3/45488; H03F3/45493; H03F3/45511; H03F3/45076; H03F3/4508; H03F3/45085; H03F3/45502; H03F2203/00; H03F2203/45; H03F2203/45406; H03F2203/45648; H03F2203/45688; H03F2203/45696
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A TRANSISTOR DIFFERENTIAL AMPLIFIER HAVING: A FIRST AND A SECOND CONNECTION MEANS FOR CONNECTING TO A POTENTIAL BIAS SOURCE, A PAIR OF INPUT TRANSISTORS FOR RECEIVING AN INPUT SIGNAL BETWEEN THE BASE ELECTRODES THEREOF, AND A COMMON MODE NEGATIVE FEEDBACK PATH, SAID PATH INCLUDING A NEGATIVE FEEDBACK RESISTOR CONNECTED TO SAID SECOLND CONNECTION MEANS, THE IMPROVEMENT COMPRISING: A PAIR OF DYNAMIC LOAD TRANSISTORS EACH HAVING THE EMITTER-COLLECTOR CIRCUIT THEREOF CONNECTED IN SERIES WITH THE EMITTER-COLLECTOR CIRCUITS OF A DIFFERENT ONE OF SAID INPUT
Claim 2
Dependent Claim
84 words
IN A TRANSISTOR DIFFERENTIAL AMPLIFIER HAVING: A FIRST AND A SECOND CONNECTION MEANS FOR CONNECTING TO A POTENTIAL BIAS SOURCE, A PAIR OF INPUT TRANSISTORS FOR RECEIVING AN INPUT SIGNAL BETWEEN THE BASE ELECTRODES THEREOF, AND A COMMON MODE NEGATIVE FEEDBACK PATH, SAID PATH INCLUDING A NEGATIVE FEEDBACK RESISTOR CONNECTED TO SAID SECOLND CONNECTION MEANS, THE IMPROVEMENT COMPRISING: A PAIR OF DYNAMIC LOAD TRANSISTORS EACH HAVING THE EMITTER-COLLECTOR CIRCUIT THEREOF CONNECTED IN SERIES WITH THE EMITTER-COLLECTOR CIRCUITS OF A DIFFERENT ONE OF SAID INPUT
References Cited (Backward Citations)
US3275944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |