Patent US3448292A successfully refreshed from Google Patents.
US3448292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wideband agc circuit
Assignee: International Business Machines Corp
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Filing: 1966-08-01
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Granted: 1969-06-03
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Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 Francis Edward Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3005; H03G3/301; H03G3/3015; H03G1/00; H03G1/0005; H03G1/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A PHASE SHIFT OSCILLATOR, MEANS FOR STABILIZING THEE AMPLITUDE OF THE FEEDBACK VOLTAGE, COMPRISING: MEANS FOR SENSING THE AMPLITUDE OF THE FEEDBACK VOLTAGE AND DERIVING CURRENT PULSES HAVING A WIDTH PROPORTIONAL TO SAID AMPLITUDE; MEANS INCLUDING FIRST CAPACITOR MEANS, FOR INTEGRATING SAID CURRENT PULSES TO PROVIDE A CONTOL SIGNAL; TRANSISTOR MEANS HAVING A CONTROL ELECTRODE, CONNECTED TO SAID FIRST CAPACITOR MEANS, AND OUTPUT TERMINALS; MEANS CONNECTING A FIRST OF SAID OUTPUT TERMINALS TO A POWER SOURCE; DIODE MEANS CONNECTED TO A SECOND OF SAID OUTPUT TERMINALS;
Claim 2
Dependent Claim
87 words
IN A PHASE SHIFT OSCILLATOR, MEANS FOR STABILIZING THEE AMPLITUDE OF THE FEEDBACK VOLTAGE, COMPRISING: MEANS FOR SENSING THE AMPLITUDE OF THE FEEDBACK VOLTAGE AND DERIVING CURRENT PULSES HAVING A WIDTH PROPORTIONAL TO SAID AMPLITUDE; MEANS INCLUDING FIRST CAPACITOR MEANS, FOR INTEGRATING SAID CURRENT PULSES TO PROVIDE A CONTOL SIGNAL; TRANSISTOR MEANS HAVING A CONTROL ELECTRODE, CONNECTED TO SAID FIRST CAPACITOR MEANS, AND OUTPUT TERMINALS; MEANS CONNECTING A FIRST OF SAID OUTPUT TERMINALS TO A POWER SOURCE; DIODE MEANS CONNECTED TO A SECOND OF SAID OUTPUT TERMINALS;
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |