US3165698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency stabilization utilizing oscillation search sweep
Assignee: Microdot Inc
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Filing: 1962-08-02
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Granted: 1965-01-12
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Expires: 1982-08-02
Abstract
No abstract record available.
Inventors
- 👤 Clifford K Friend
- 👤 Adrian D Taylor
- 👤 Stankey John Edward
- 👤 Richard H Swartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A CIRCUIT FOR ACQUIRING AND STABLIZING THE CENTER FREQUENCY OF A FREQUENCY-MODULATED SIGNAL, INCLUDING: A FIRST TERMINAL FOR THE FREQUENCY-MODULATED SIGNAL; MEANS INCLUDING A BALANCED DISCRIMINATOR HAVING SUBSTANTIALLY IDENTICAL OPERATING CHARACTERISTICS ON BOTH SIDES OF A CORRECT CENTER FREQUENCY AND OPERABLE THROUGH A PARTICULAR RANGE OF FREQUENCIES FOR DEMODULATING THE FREQUENCY-MODULATED SIGNAL TO PRODUCE AN ERROR SIGNAL HAVING A MAGNITUDE REPRESENTING THE MAGNITUDE OF THE DEVIATION OF THE ACTUAL CENTER FREQUENCY OF THE FREQUENCY-MODULATED SIGNAL FROM THE CORRECT CENTER FREQUENCY AND HAVING A POLARITY REPRESENTING THE DIRECTION OF THE DEVIATION
Claim 2
Dependent Claim
90 words
A CIRCUIT FOR ACQUIRING AND STABLIZING THE CENTER FREQUENCY OF A FREQUENCY-MODULATED SIGNAL, INCLUDING: A FIRST TERMINAL FOR THE FREQUENCY-MODULATED SIGNAL; MEANS INCLUDING A BALANCED DISCRIMINATOR HAVING SUBSTANTIALLY IDENTICAL OPERATING CHARACTERISTICS ON BOTH SIDES OF A CORRECT CENTER FREQUENCY AND OPERABLE THROUGH A PARTICULAR RANGE OF FREQUENCIES FOR DEMODULATING THE FREQUENCY-MODULATED SIGNAL TO PRODUCE AN ERROR SIGNAL HAVING A MAGNITUDE REPRESENTING THE MAGNITUDE OF THE DEVIATION OF THE ACTUAL CENTER FREQUENCY OF THE FREQUENCY-MODULATED SIGNAL FROM THE CORRECT CENTER FREQUENCY AND HAVING A POLARITY REPRESENTING THE DIRECTION OF THE DEVIATION
References Cited (Backward Citations)
US2681414A
Cited
US2969458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |