Patent US3263169A successfully refreshed from Google Patents.
US3263169A
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Automatic gain control for recirculating loop spectrum analyzer
Assignee: International Business Machines Corp
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Filing: 1962-10-31
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Granted: 1966-07-26
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Expires: 1982-10-31
Abstract
No abstract record available.
Inventors
- 👤 Winslow R Remley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN AUTOMATIC GAIN CONTROL CIRCUIT FOR A SPECTRUM ANALYZER COMPRISING: GENERATING MEANS FOR GENERATING A CONTROL SIGNAL HAVING AN AMPLITUDE GREATER THAN THE AMPLITUDES OF FREQUENCY COMPONENTS IN A SIGNAL TO BE ANALYZED; A SIGNAL CIRCULATING LOOP INCLUDING IN SERIES RELATIONSHIP A RELAY LINE ELEMENT, A HETERODYNING CIRCUIT, A VARIABLE GAIN AMPLIFIER, AND SUMMING CIRCUIT MEANS FOR COMBINING THE SIGNAL TO BE ANALYZED AND SAID CONTROL SIGNAL WITH SIGNALS CIRCULATING IN SAID LOOP, SAID GENERATING MEANS CONNECTED TO SAID SUMMING CIRCUIT MEANS FOR INJECTING SAID CONTROL SIGNAL INTO SAID CIRCULATING LOOP; GATING MEANS CONNECTED TO SAID LOOP FOR PASSING SIGNALS CIRCULATING IN SAID LOOP EXCEEDING A PREDETERMINED THRESHOLD; AND AMPLIFIER CONTROL MEANS RESPONSIVE TO CHANGES IN THE SIGNALS PASSING THROUGH SAID GATING MEANS FOR CORRECTING THE GAIN OF AMPLIFIER IN A MANNER INVERSE TO THE CHANGE OF SAID SIGNALS PASSING THROUGH SAID GATE.
Claim 2
Dependent Claim
143 words
AN AUTOMATIC GAIN CONTROL CIRCUIT FOR A SPECTRUM ANALYZER COMPRISING: GENERATING MEANS FOR GENERATING A CONTROL SIGNAL HAVING AN AMPLITUDE GREATER THAN THE AMPLITUDES OF FREQUENCY COMPONENTS IN A SIGNAL TO BE ANALYZED; A SIGNAL CIRCULATING LOOP INCLUDING IN SERIES RELATIONSHIP A RELAY LINE ELEMENT, A HETERODYNING CIRCUIT, A VARIABLE GAIN AMPLIFIER, AND SUMMING CIRCUIT MEANS FOR COMBINING THE SIGNAL TO BE ANALYZED AND SAID CONTROL SIGNAL WITH SIGNALS CIRCULATING IN SAID LOOP, SAID GENERATING MEANS CONNECTED TO SAID SUMMING CIRCUIT MEANS FOR INJECTING SAID CONTROL SIGNAL INTO SAID CIRCULATING LOOP; GATING MEANS CONNECTED TO SAID LOOP FOR PASSING SIGNALS CIRCULATING IN SAID LOOP EXCEEDING A PREDETERMINED THRESHOLD; AND AMPLIFIER CONTROL MEANS RESPONSIVE TO CHANGES IN THE SIGNALS PASSING THROUGH SAID GATING MEANS FOR CORRECTING THE GAIN OF AMPLIFIER IN A MANNER INVERSE TO THE CHANGE OF SAID SIGNALS PASSING THROUGH SAID GATE.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |