Patent US3290520A successfully refreshed from Google Patents.
US3290520A
Expired / Lapsed
US
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Circuit for detecting amplitude threshold with means to keep threshold constant
Assignee: RCA Corp
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Filing: 1965-01-26
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Granted: 1966-12-06
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Lawrence P Wennik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:29
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H03K3/2897
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN ELECTRICAL CIRCUIT COMPRISING, A DIFFERENTIAL AMPLIFIER HAVING FIRST AND SECOND INPUTS, FIRST AND SECOND OUTPUTS, AND FIRST AND SECOND POWER TERMINALS, SAID FIRST POWER TERMINAL BEING COUPLED TO A FIRST CIRCUIT JUNCTION; A CURRENT SOURCE HAVING AT LEAST TWO TERMINALS, ONE OF SAID CURRENT SOURCE TERMINALS BEING COUPLED TO SAID SECOND POWER TERMINAL, THE OTHER OF SAID CURRENT SOURCE TERMINALS BEING COUPLED TO A SECOND CIRCUIT JUNCTION; FIRST, SECOND AND THIRD TRANSISTORS, EACH HAVING BASE, COLLECTOR AND EMITTER ELECTRODES, THE EMITTER ELECTRODES OF EACH TRANSISTOR BEING COUPLED TO A THIRD CIRCUIT JUNCTION, THE COLLECTOR ELECTRODES OF EACH TRANSISTOR BEING COUPLED TO SAID FIRST CIRCUIT JUNCTION, SAID FIRST AND SECOND AMPLIFIER OUTPUTS BEING COUPLED TO THE BASE ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS RESPECTIVELY, AND
Claim 2
Dependent Claim
126 words
AN ELECTRICAL CIRCUIT COMPRISING, A DIFFERENTIAL AMPLIFIER HAVING FIRST AND SECOND INPUTS, FIRST AND SECOND OUTPUTS, AND FIRST AND SECOND POWER TERMINALS, SAID FIRST POWER TERMINAL BEING COUPLED TO A FIRST CIRCUIT JUNCTION; A CURRENT SOURCE HAVING AT LEAST TWO TERMINALS, ONE OF SAID CURRENT SOURCE TERMINALS BEING COUPLED TO SAID SECOND POWER TERMINAL, THE OTHER OF SAID CURRENT SOURCE TERMINALS BEING COUPLED TO A SECOND CIRCUIT JUNCTION; FIRST, SECOND AND THIRD TRANSISTORS, EACH HAVING BASE, COLLECTOR AND EMITTER ELECTRODES, THE EMITTER ELECTRODES OF EACH TRANSISTOR BEING COUPLED TO A THIRD CIRCUIT JUNCTION, THE COLLECTOR ELECTRODES OF EACH TRANSISTOR BEING COUPLED TO SAID FIRST CIRCUIT JUNCTION, SAID FIRST AND SECOND AMPLIFIER OUTPUTS BEING COUPLED TO THE BASE ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS RESPECTIVELY, AND
References Cited (Backward Citations)
US3054910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |