US3090927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gain control circuit
Assignee: Telefunken AG
•
Filing: 1960-08-01
•
Granted: 1963-05-21
•
Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 Minner Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:49
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/52; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03G3/3057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A TUNED HIGH FREQUENCY TRANSISTORIZED AMPLIFIER HAVING A RECTIFIED OUTPUT COMPRISING A GAIN CONTROL POTENTIAL AND HAVING A FOUR-TERMINAL TRANSMISSION NETWORK CONNECTED TO THE INPUT TO THE AMPLIFIER, SAID NETWORK HAVING IN A SERIES BRANCH A DIODE RECTIFIER CONTROLLED BY A D.C. CONTROL VOLTAGE DELIVERED BY A CONTROL TRANSISTOR CONNECTED TO RECEIVED SAID GAIN CONTROL POTENTIAL AND TO DELIVER SAID CONTROL VOLTAGE TO SAID DIODE RETIFIER FORWARD-BIASING THE LATTER IN THE ABSENCE OF A SIGNAL INPUT VOLTAGE TO THE NETWORK IN THE PRESENCE OF A SMALL INPUT SIGNAL VOLTAGE, AND FOR REVERSE-BIASING SAID DIODE RECTIFIER IN THE PRESENCE OF SUBSTANTIAL INCREASE IN THE INPUT SIGNAL VOLTAGE, THE IMPROVEMENT COMPRISING MEANS CONNECTED IN PARALLEL WITH SAID DIODE RECTIFIER FOR NEUTRALIZING THE RESIDUAL SERIES RESISTANCE AND CAPACITANCE THEREOF WHEN THE DIODE IS FULLY REVERSE-BIASED.
Claim 2
Dependent Claim
133 words
IN A TUNED HIGH FREQUENCY TRANSISTORIZED AMPLIFIER HAVING A RECTIFIED OUTPUT COMPRISING A GAIN CONTROL POTENTIAL AND HAVING A FOUR-TERMINAL TRANSMISSION NETWORK CONNECTED TO THE INPUT TO THE AMPLIFIER, SAID NETWORK HAVING IN A SERIES BRANCH A DIODE RECTIFIER CONTROLLED BY A D.C. CONTROL VOLTAGE DELIVERED BY A CONTROL TRANSISTOR CONNECTED TO RECEIVED SAID GAIN CONTROL POTENTIAL AND TO DELIVER SAID CONTROL VOLTAGE TO SAID DIODE RETIFIER FORWARD-BIASING THE LATTER IN THE ABSENCE OF A SIGNAL INPUT VOLTAGE TO THE NETWORK IN THE PRESENCE OF A SMALL INPUT SIGNAL VOLTAGE, AND FOR REVERSE-BIASING SAID DIODE RECTIFIER IN THE PRESENCE OF SUBSTANTIAL INCREASE IN THE INPUT SIGNAL VOLTAGE, THE IMPROVEMENT COMPRISING MEANS CONNECTED IN PARALLEL WITH SAID DIODE RECTIFIER FOR NEUTRALIZING THE RESIDUAL SERIES RESISTANCE AND CAPACITANCE THEREOF WHEN THE DIODE IS FULLY REVERSE-BIASED.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |