US3137805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal converting circuit
Assignee: First Pennsylvania Banking and Trust Co
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Filing: 1960-09-09
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Granted: 1964-06-16
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Expires: 1980-09-09
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:05
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A SIGNAL CONVERTING CIRCUIT COMPRISING MEANS FOR COMPARING AN INPUT SIGNAL AND A FEEDBACK SIGNAL AND FOR PRODUCING AN ERROR SIGNAL IN ACCORDANCE WITH THE DIFFERENCE BETWEEN THE INPUT AND FEEDBACK SIGNALS, MEANS FOR AMPLIFYING SAID ERROR SIGNAL AND FOR PRODUCING SAID FEEDBACK SIGNAL AND AN OUTPUT SIGNAL THEREFROM, SAID AMPLIFYING AND SIGNAL PRODUCING MEANS INCLUDING AN ELECTRON CONTROL DEVICE AND A PLURALITY OF IMPEDANCE ELEMENTS CONNECTED IN A SERIES CIRCUIT WITH SAID CONTROL DEVICE CONNECTED BETWEEN SAID IMPEDANCE ELEMENTS, SAID CONTROL DEVICE BEING CONNECTED FOR ITS IMPEDANCE TO BE CONTROLLED IN ACCORDANCE WITH SAID ERROR SIGNAL, MEANS CONNECTED TO SAID IMPEDANCE ELEMENT ON ONE SIDE OF SAID CONTROL DEVICE FOR SUPPLYING SAID FEEDBACK SIGNAL TO SAID COMPARING MEANS TO MINIMIZE SAID ERROR SIGNAL, AND A HIGH-IMPEDANCE OUTPUT DEVICE CONNECTED TO SAID IMPEDANCE ELEMENT ON THE OTHER SIDE OF SAID CONTROL DEVICE FOR RECEIVING AN OUTPUT SIGNAL PROPORTIONAL TO SAID FEEDBACK SIGNAL, SAID ELECTRON CONTROL DEVICE PRODUCING OPPOSITELY PHASED FEEDBACK AND OUTPUT SIGNALS.
Claim 2
Dependent Claim
163 words
A SIGNAL CONVERTING CIRCUIT COMPRISING MEANS FOR COMPARING AN INPUT SIGNAL AND A FEEDBACK SIGNAL AND FOR PRODUCING AN ERROR SIGNAL IN ACCORDANCE WITH THE DIFFERENCE BETWEEN THE INPUT AND FEEDBACK SIGNALS, MEANS FOR AMPLIFYING SAID ERROR SIGNAL AND FOR PRODUCING SAID FEEDBACK SIGNAL AND AN OUTPUT SIGNAL THEREFROM, SAID AMPLIFYING AND SIGNAL PRODUCING MEANS INCLUDING AN ELECTRON CONTROL DEVICE AND A PLURALITY OF IMPEDANCE ELEMENTS CONNECTED IN A SERIES CIRCUIT WITH SAID CONTROL DEVICE CONNECTED BETWEEN SAID IMPEDANCE ELEMENTS, SAID CONTROL DEVICE BEING CONNECTED FOR ITS IMPEDANCE TO BE CONTROLLED IN ACCORDANCE WITH SAID ERROR SIGNAL, MEANS CONNECTED TO SAID IMPEDANCE ELEMENT ON ONE SIDE OF SAID CONTROL DEVICE FOR SUPPLYING SAID FEEDBACK SIGNAL TO SAID COMPARING MEANS TO MINIMIZE SAID ERROR SIGNAL, AND A HIGH-IMPEDANCE OUTPUT DEVICE CONNECTED TO SAID IMPEDANCE ELEMENT ON THE OTHER SIDE OF SAID CONTROL DEVICE FOR RECEIVING AN OUTPUT SIGNAL PROPORTIONAL TO SAID FEEDBACK SIGNAL, SAID ELECTRON CONTROL DEVICE PRODUCING OPPOSITELY PHASED FEEDBACK AND OUTPUT SIGNALS.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |