Patent US3075140A successfully refreshed from Google Patents.
US3075140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuator circuit
Assignee: TDK Micronas GmbH
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Filing: 1959-04-13
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Granted: 1963-01-22
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Ii Dwight W Casey
- 👤 Sidney J Worley
- 👤 Harley R Meadows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:19
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN AN ATTENUATOR CIRCUIT; A SIGNAL CIRCUIT COMPRISING SIGNAL INPUT AND OUTPUT TERMINALS, FIRST FIXED IMPEDANCE MEANS SERIALLY CONNECTED BETWEEN SAID TERMINALS, AND SECOND FIXED IMPEDANCE MEANS COUPLED IN SHUNT WITH SAID OUTPUT TERMINAL AND A SOURCE OF REFERENCE POTENTIAL WHEREBY A SIGNAL IMPRESSED UPON SAID INPUT TERMINAL NORMALLY RECEIVES A FIRST PREDETERMINED ATTENUATION; FIRST AMPLIFIER MEANS HAVING A PREDETERMINED GAIN; SECOND AMPLIFIER MEANS HAVING A CONTROL CIRCUIT AND A LOAD CIRCUIT INCLUDING SAID SECOND FIXED IMPEDANCE MEANS BUT EXCLUDING SAID FIRST FIXED IMPEDANCE MEANS; AND GATING MEANS FOR COUPLING SAID FIRST AMPLIFIER MEANS IN A FEEDBACK LOOP BETWEEN SAID OUTPUT TERMINAL AND SAID CONTROL CIRCUIT OF SAID SECOND AMPLIFIER MEANS RESPONSIVE TO A CONTROL SIGNAL WHEREBY ADDITIONAL ATTENUATION PROPORTIONAL TO SAID FIRST AMPLIFIER MEANS GAIN IS INSERTED IN SAID SIGNAL CIRCUIT RESPONSIVE TO SAID CONTROL SIGNAL.
Claim 2
Dependent Claim
137 words
IN AN ATTENUATOR CIRCUIT; A SIGNAL CIRCUIT COMPRISING SIGNAL INPUT AND OUTPUT TERMINALS, FIRST FIXED IMPEDANCE MEANS SERIALLY CONNECTED BETWEEN SAID TERMINALS, AND SECOND FIXED IMPEDANCE MEANS COUPLED IN SHUNT WITH SAID OUTPUT TERMINAL AND A SOURCE OF REFERENCE POTENTIAL WHEREBY A SIGNAL IMPRESSED UPON SAID INPUT TERMINAL NORMALLY RECEIVES A FIRST PREDETERMINED ATTENUATION; FIRST AMPLIFIER MEANS HAVING A PREDETERMINED GAIN; SECOND AMPLIFIER MEANS HAVING A CONTROL CIRCUIT AND A LOAD CIRCUIT INCLUDING SAID SECOND FIXED IMPEDANCE MEANS BUT EXCLUDING SAID FIRST FIXED IMPEDANCE MEANS; AND GATING MEANS FOR COUPLING SAID FIRST AMPLIFIER MEANS IN A FEEDBACK LOOP BETWEEN SAID OUTPUT TERMINAL AND SAID CONTROL CIRCUIT OF SAID SECOND AMPLIFIER MEANS RESPONSIVE TO A CONTROL SIGNAL WHEREBY ADDITIONAL ATTENUATION PROPORTIONAL TO SAID FIRST AMPLIFIER MEANS GAIN IS INSERTED IN SAID SIGNAL CIRCUIT RESPONSIVE TO SAID CONTROL SIGNAL.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |