Patent US3333208A successfully refreshed from Google Patents.
US3333208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gain control amplifier
Assignee: General Electric Co
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Filing: 1963-10-09
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Granted: 1967-07-25
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Hudak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
AUTOMATIC GAIN CONTROLLED AMPLIFYING APPARATUS COMPRISING: (A) AN AMPLIFIER HAVING AN ELECTRICALLY CONTROLLABLE GAIN ADJUSTING ELEMENT FOR ADJUSTING THE OVERALL GAIN THEREOF; (B) A VOLUME COMPRESSION CIRCUIT RESPONSIVE TO SIGNALS APPEARING AT THE OUTPUT OF SAID AMPLIFIER FOR APPLYING A CONTROL VOLTAGE TO SAID GAIN ADJUSTING ELEMENT TO REDUCE THE OVERALL GAIN OF SAID AMPLIFIER WHEN A PREDETERMINED COMPRESSION THRESHOLD LEVEL OF SAID OUTPUT SIGNALS IS EXCEEDED, SAID COMPRESSION CIRCUIT HAVING A PREDETERMINED RATE OF RECOVERY UPON REDUCTION IN LEVEL OF SAID OUTPUT SIGNALS BELOW SAID COMPRESSION THRESHOLD LEVEL; (C) A VOLUME REDUCTION CIRCUIT RESPONSIVE TO SAID OUTPUT SIGNALS FOR DEVELOPING ANOTHER CONTROL VOLTAGE ACROSS A CAPACITOR, MEANS CONNECTED TO SAID CAPACITOR FOR LIMITING THE MAXIMUM UNIDIRECTIONAL VOLTAGE ACROSS SAID CAPACITOR, A DISCHARGE CIRCUIT CONNECTED ACROSS SAID CAPACITOR FOR PROVIDING A RATE OF DECAY OF SAID OTHER CONTROL VOLTAGE WHEN SAID OUTPUT SIGNALS APPLIED THERETO DROP BELOW ANOTHER THRESHOLD LEVEL, SAID OTHER THRESHOLD LEVEL BEING LOWER THAN SAID COMPRESSION LEVEL; (D) MEANS FOR ACTUATING SAID GAIN ADJUSTING ELEMENT TO REDUCE THE OVERALL GAIN OF SAID AMPLIFIER IN RESPONSE TO A DECAY IN SAID OTHER CONTROL VOLTAGE TO A PREDETERMINED VALUE, THE CIRCUIT ELEMENTS OF SAID VOLUME REDUCTION CIRCUIT BEING PROPORTIONED TO PROVIDE A RATE OF DECAY OF SAID OTHER CONTROL VOLTAGE APPROXIMATELY EQUAL TO THE RATE OF RECOVERY OF SAID COMPRESSION CIRCUIT.
Claim 2
Dependent Claim
222 words
AUTOMATIC GAIN CONTROLLED AMPLIFYING APPARATUS COMPRISING: (A) AN AMPLIFIER HAVING AN ELECTRICALLY CONTROLLABLE GAIN ADJUSTING ELEMENT FOR ADJUSTING THE OVERALL GAIN THEREOF; (B) A VOLUME COMPRESSION CIRCUIT RESPONSIVE TO SIGNALS APPEARING AT THE OUTPUT OF SAID AMPLIFIER FOR APPLYING A CONTROL VOLTAGE TO SAID GAIN ADJUSTING ELEMENT TO REDUCE THE OVERALL GAIN OF SAID AMPLIFIER WHEN A PREDETERMINED COMPRESSION THRESHOLD LEVEL OF SAID OUTPUT SIGNALS IS EXCEEDED, SAID COMPRESSION CIRCUIT HAVING A PREDETERMINED RATE OF RECOVERY UPON REDUCTION IN LEVEL OF SAID OUTPUT SIGNALS BELOW SAID COMPRESSION THRESHOLD LEVEL; (C) A VOLUME REDUCTION CIRCUIT RESPONSIVE TO SAID OUTPUT SIGNALS FOR DEVELOPING ANOTHER CONTROL VOLTAGE ACROSS A CAPACITOR, MEANS CONNECTED TO SAID CAPACITOR FOR LIMITING THE MAXIMUM UNIDIRECTIONAL VOLTAGE ACROSS SAID CAPACITOR, A DISCHARGE CIRCUIT CONNECTED ACROSS SAID CAPACITOR FOR PROVIDING A RATE OF DECAY OF SAID OTHER CONTROL VOLTAGE WHEN SAID OUTPUT SIGNALS APPLIED THERETO DROP BELOW ANOTHER THRESHOLD LEVEL, SAID OTHER THRESHOLD LEVEL BEING LOWER THAN SAID COMPRESSION LEVEL; (D) MEANS FOR ACTUATING SAID GAIN ADJUSTING ELEMENT TO REDUCE THE OVERALL GAIN OF SAID AMPLIFIER IN RESPONSE TO A DECAY IN SAID OTHER CONTROL VOLTAGE TO A PREDETERMINED VALUE, THE CIRCUIT ELEMENTS OF SAID VOLUME REDUCTION CIRCUIT BEING PROPORTIONED TO PROVIDE A RATE OF DECAY OF SAID OTHER CONTROL VOLTAGE APPROXIMATELY EQUAL TO THE RATE OF RECOVERY OF SAID COMPRESSION CIRCUIT.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |