US3101451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current amplifier system with feedback controlled high impedance input circuit
Assignee: Honeywell Inc
•
Filing: 1958-10-17
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Granted: 1963-08-20
•
Expires: 1978-10-17
Abstract
No abstract record available.
Inventors
- 👤 John P Burgarella
- 👤 Donald S Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:22
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A DIRECT CURRENT AMPLIFIER SYSTEM COMPRISING, IN COMBINATION, AN INPUT CIRCUIT, A MAGNETIC CONVERTER, AN ALTERNATING CURRENT AMPLIFIER, SAID INPUT CIRCUIT BEING COUPLED INDUCTIVELY ONLY THROUGH SAID CONVERTER TO SAID ALTERNATING CURRENT AMPLIFIER, A SYNCHRONOUS DEMODULATOR COUPLED TO DEMODULATE THE OUTPUT OF SAID ALTERNATING CURRENT AMPLIFIER TO PRODUCE A SYSTEM OUTPUT SIGNAL, A FEEDBACK CIRCUIT RESPONSIVE TO SAID OUTPUT SIGNAL, SAID FEEDBACK CIRCUIT INCLUDING A SECOND-MAGNETIC CONVERTER, A SECOND ALTERNATING CURRENT AMPLIFIER AND A SECOND SYNCHRONOUS DEMODULATOR SAID SECOND SYNCHRONOUS DEMODULATOR BEING COUPLED INDUCTIVELY ONLY TO THE OUTPUT OF SAID SECOND ALTERNATING CURRENT AMPLIFIER, AND MEANS CONNECTING THE OUTPUT OF SAID SECOND DEMODULATOR IN FEEDBACK RELATION TO SAID INPUT CIRCUIT WHEREBY TO PROVIDE A FEEDBACK CONTROLLED HIGH IMPEDANCE INPUT CIRCUIT WITHOUT CONDUCTIVE COUPLING BETWEEN SAID INPUT CIRCUIT AND THE OUT OF THE DIRECT CURRENT AMPLIFIER.
Claim 2
Dependent Claim
135 words
A DIRECT CURRENT AMPLIFIER SYSTEM COMPRISING, IN COMBINATION, AN INPUT CIRCUIT, A MAGNETIC CONVERTER, AN ALTERNATING CURRENT AMPLIFIER, SAID INPUT CIRCUIT BEING COUPLED INDUCTIVELY ONLY THROUGH SAID CONVERTER TO SAID ALTERNATING CURRENT AMPLIFIER, A SYNCHRONOUS DEMODULATOR COUPLED TO DEMODULATE THE OUTPUT OF SAID ALTERNATING CURRENT AMPLIFIER TO PRODUCE A SYSTEM OUTPUT SIGNAL, A FEEDBACK CIRCUIT RESPONSIVE TO SAID OUTPUT SIGNAL, SAID FEEDBACK CIRCUIT INCLUDING A SECOND-MAGNETIC CONVERTER, A SECOND ALTERNATING CURRENT AMPLIFIER AND A SECOND SYNCHRONOUS DEMODULATOR SAID SECOND SYNCHRONOUS DEMODULATOR BEING COUPLED INDUCTIVELY ONLY TO THE OUTPUT OF SAID SECOND ALTERNATING CURRENT AMPLIFIER, AND MEANS CONNECTING THE OUTPUT OF SAID SECOND DEMODULATOR IN FEEDBACK RELATION TO SAID INPUT CIRCUIT WHEREBY TO PROVIDE A FEEDBACK CONTROLLED HIGH IMPEDANCE INPUT CIRCUIT WITHOUT CONDUCTIVE COUPLING BETWEEN SAID INPUT CIRCUIT AND THE OUT OF THE DIRECT CURRENT AMPLIFIER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |