US3142022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control and sweep circuit
Assignee: General Precision Inc
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Filing: 1961-06-07
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Granted: 1964-07-21
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Expires: 1981-06-07
Abstract
No abstract record available.
Inventors
- 👤 John W Gray
- 👤 Reed Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/10; H03L7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
AN AUTOMATIC FREQUENCY CONTROL AND SWEEP CIRCUIT COMPRISING, A HIGH FREQUENCY SIGNAL GENERATOR, A LOCAL OSCILLATOR, MIXER MEANS HAVING THE OUTPUTS OF SAID SIGNAL GENERATOR AND SAID LOCAL OSCILLATOR IMPRESSED THEREON AND PRODUCING AN INTERMEDIATE FREQUENCY SIGNAL THEREFROM, DISCRIMINATOR MEANS HAVING SAID INTERMEDIATE FREQUENCY SIGNAL IMPRESSED THEREON AND PRODUCING AN OUTPUT POTENTIAL HAVING A SENSE AND MAGNITUDE DEPENDENT WITHIN LIMITS ON THE DIRECTION AND AMOUNT OF DEPARTURE OF SAID INTERMEDIATE FREQUENCY SIGNAL FROM A SELECTED VALUE, AN AMPLIFIER HAVING A CAPACITOR CONNECTED BETWEEN ITS INPUT AND OUTPUT, MEANS FOR SUPPLYING A CHARGING POTENTIAL TO SAID CAPACITOR WHEREBY SAID AMPLIFIER IN CONJUNCTION THEREWITH ACTS AS AN INTEGRATOR AND PRODUCES A SUBSTANTIALLY LINEARLY VARYING OUTPUT, SWITCH MEANS CONNECTED TO THE OUTPUT OF SAID AMPLIFIER AND ACROSS SAID CAPACITOR FOR DISCHARGING SAID CAPACITOR WHEN THE OUTPUT OF SAID AMPLIFIER REACHES A PRESELECTED VALUE AND FOR INITIATING A NEW INTEGRATION CYCLE, MEANS FOR CONTROLLING THE FREQUENCY OF SAID LOCAL OSCILLATOR BY THE OUTPUT OF SAID AMPLIFIER, AND MEANS INTERCONNECTING THE OUTPUT OF SAID DISCRIMINATOR MEANS AND THE INPUT OF SAID AMPLIFIER WHEREBY THE OUTPUT OF SAID DISCRIMINATOR MEANS OVERRIDES SAID CHARGING POTENTIAL AND TERMINATES SAID INTEGRATOR ACTION.
Claim 2
Dependent Claim
193 words
AN AUTOMATIC FREQUENCY CONTROL AND SWEEP CIRCUIT COMPRISING, A HIGH FREQUENCY SIGNAL GENERATOR, A LOCAL OSCILLATOR, MIXER MEANS HAVING THE OUTPUTS OF SAID SIGNAL GENERATOR AND SAID LOCAL OSCILLATOR IMPRESSED THEREON AND PRODUCING AN INTERMEDIATE FREQUENCY SIGNAL THEREFROM, DISCRIMINATOR MEANS HAVING SAID INTERMEDIATE FREQUENCY SIGNAL IMPRESSED THEREON AND PRODUCING AN OUTPUT POTENTIAL HAVING A SENSE AND MAGNITUDE DEPENDENT WITHIN LIMITS ON THE DIRECTION AND AMOUNT OF DEPARTURE OF SAID INTERMEDIATE FREQUENCY SIGNAL FROM A SELECTED VALUE, AN AMPLIFIER HAVING A CAPACITOR CONNECTED BETWEEN ITS INPUT AND OUTPUT, MEANS FOR SUPPLYING A CHARGING POTENTIAL TO SAID CAPACITOR WHEREBY SAID AMPLIFIER IN CONJUNCTION THEREWITH ACTS AS AN INTEGRATOR AND PRODUCES A SUBSTANTIALLY LINEARLY VARYING OUTPUT, SWITCH MEANS CONNECTED TO THE OUTPUT OF SAID AMPLIFIER AND ACROSS SAID CAPACITOR FOR DISCHARGING SAID CAPACITOR WHEN THE OUTPUT OF SAID AMPLIFIER REACHES A PRESELECTED VALUE AND FOR INITIATING A NEW INTEGRATION CYCLE, MEANS FOR CONTROLLING THE FREQUENCY OF SAID LOCAL OSCILLATOR BY THE OUTPUT OF SAID AMPLIFIER, AND MEANS INTERCONNECTING THE OUTPUT OF SAID DISCRIMINATOR MEANS AND THE INPUT OF SAID AMPLIFIER WHEREBY THE OUTPUT OF SAID DISCRIMINATOR MEANS OVERRIDES SAID CHARGING POTENTIAL AND TERMINATES SAID INTEGRATOR ACTION.
References Cited (Backward Citations)
US2686877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |