Patent US3221261A successfully refreshed from Google Patents.
US3221261A
Expired / Lapsed
US
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Amplifying system including a push-pull preamplifier and output switching amplifier
Assignee: Siemens Schuckertwerke AG
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Filing: 1962-08-14
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Granted: 1965-11-30
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Ertel Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/603; H03F; H03F1/00; H03F1/30; H03F1/302; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03K17/90; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A SENSOR SYSTEM COMPRISING A HALL GENERATOR HAVING TWO HALL-VOLTAGE ELECTRODES; AN AMPLIFIER COMPRISING A PAIR OF TRANSISTORS HAVING EMITTER, COLLECTOR AND BASE ELECTRODES CONNECTED SYMMETRICALLY AND HAVING RESPECTIVE INPUTS CONNECTED TO EACH HALL-VOLTAGE ELECTRODE AND HAVING RESPECTIVE OUTPUTS; TWO SWITCHING AMPLIFIERS HAVING RESPECTIVE PATHS OF MAJOR CURRENT FLOW CONNECTED IN SERIES WITH EACH OF SAID OUTPUTS AND HAVING RESPECTIVE CONTROL CIRCUITS CONNECTED TO THE OPPOSITE ONES OF SAID OUTPUTS; A FIRST CURRENT SOURCE CONNECTED ACROSS SAID SYMMETRICAL AMPLIFIER AND CONNECTED TO SAID HALL-VOLTAGE GENERATOR FOR ENERGIZING IT; A SECOND CURRENT SOURCE CONNECTED TO SAID SWITCHING AMPLIFIERS FOR ENERGIZING THEM; AND MEANS FOR DERIVING AN OUTPUT FROM EACH OF SAID SWITCHING AMPLIFIERS.
References Cited (Backward Citations)
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Cited
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US2725504A
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US2936345A
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US3047736A
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |