US3351848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct voltage regulators with reduced dynamic output impedance
Assignee: US Philips Corp
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Filing: 1965-06-25
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Granted: 1967-11-07
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Lodder Johannis Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
H; H04; H04B; H04B15/00; H04B15/005; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/618; H02; H02M; H02M1/00; H02M1/14; H02M1/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A REGULATOR FOR A DIRECT VOLTAGE ACROSS HAVING AN OUTPUT SMOOTHING FILTER INCLUDING A SERIES IMPEDANCE, COMPRISING: FIRST AND SECOND TRANSISTORS HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, THE EMITTER-COLLECTOR CIRCUIT OF THE FIRST TRANSISTOR BEING CONNECTED BETWEEN THE OUTPUT TERMINALS OF SAID FILTER, THE EMITTER-COLLECTOR CIRCUIT OF THE SECOND TRANSISTOR BEING CONNECTED BETWEEN THE OUTPUT TERMINAL CONNECTED TO THE SERIES IMPEDANCE AND A POINT AT A POTENTIAL HIGHER THAN THAT AND HAVING THE SAME POLARITY AS THAT OF SAID OUTPUT TERMINAL, MEANS FOR BIASING BOTH TRANSISTORS TO BE NONCONDUCTING, AND AN ALTERNATING CURRENT COUPLING BETWEEN SAID SERIES IMPEDANCE AND EACH OF SAID BASES, SAID FIRST TRANSISTOR BECOMING TEMPORARILY CONDUCTING UPON A DECREASE IN THE CURRENT FLOWING THROUGH THE SERIES-IMPEDANCE, AND THE SECOND TRANSISTOR BECOMING TEMPORARILY CONDUCTING UPON AN INCREASE IN SAID CURRENT, WHEREBY THE DYNAMIC OUTPUT IMPEDANCE OF THE DIRECT VOLTAGE SOURCE IS REDUCED.
Claim 2
Dependent Claim
144 words
A REGULATOR FOR A DIRECT VOLTAGE ACROSS HAVING AN OUTPUT SMOOTHING FILTER INCLUDING A SERIES IMPEDANCE, COMPRISING: FIRST AND SECOND TRANSISTORS HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, THE EMITTER-COLLECTOR CIRCUIT OF THE FIRST TRANSISTOR BEING CONNECTED BETWEEN THE OUTPUT TERMINALS OF SAID FILTER, THE EMITTER-COLLECTOR CIRCUIT OF THE SECOND TRANSISTOR BEING CONNECTED BETWEEN THE OUTPUT TERMINAL CONNECTED TO THE SERIES IMPEDANCE AND A POINT AT A POTENTIAL HIGHER THAN THAT AND HAVING THE SAME POLARITY AS THAT OF SAID OUTPUT TERMINAL, MEANS FOR BIASING BOTH TRANSISTORS TO BE NONCONDUCTING, AND AN ALTERNATING CURRENT COUPLING BETWEEN SAID SERIES IMPEDANCE AND EACH OF SAID BASES, SAID FIRST TRANSISTOR BECOMING TEMPORARILY CONDUCTING UPON A DECREASE IN THE CURRENT FLOWING THROUGH THE SERIES-IMPEDANCE, AND THE SECOND TRANSISTOR BECOMING TEMPORARILY CONDUCTING UPON AN INCREASE IN SAID CURRENT, WHEREBY THE DYNAMIC OUTPUT IMPEDANCE OF THE DIRECT VOLTAGE SOURCE IS REDUCED.
References Cited (Backward Citations)
US2956172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |