US3361986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-distortion sweep signal generator with superimposed frequency modulation
Assignee: Automatic Electric Laboratories Inc
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Filing: 1966-10-20
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Granted: 1968-01-02
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Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Catania Basilio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/18; H03B; H03B23/00; H03B5/00; H03B5/08; H03B5/12; H03B5/1206; H03B5/1218; H03B5/1231; H03B5/1237; H03B5/124; H03B5/1243; H03B5/1296; H03C3/22; H03C3/222; H03B21/00; H03B2200/00; H03B2200/003; H03B2200/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A SIGNAL GENERATOR HAVING FIRST AND SECOND OSCILLATORS, A TEST FREQUENCY CONTROL CIRCUIT CONNECTED TO SAID FIRST OSCILLATOR FOR FREQUENCY MODULATING THE OUTPUT THEREOF, A SWEEP FREQUENCY CONTROL CIRCUIT ALSO CONNECTED TO SAID FIRST OSCILLATOR FOR SWEEPING THE CENTER FREQUENCY OF THE FREQUENCY MODULATED OUTPUT OVER A WIDE FREQUENCY RANGE, MEANS FOR SYNCHRONIZING THE FREQUENCY OF SAID SECOND OSCILLATOR WITH THE FREQUENCY OF SIGNAL GENERATED BY SAID FIRST OSCILLATOR OPERATIVE TO MAINTAIN THE DIFFERENCE IN FREQUENCY BETWEEN THE SIGNAL OF THE SECOND OSCILLATOR AND SAID SWEPT CENTER FREQUENCY CONSTANT, A MIXER CONNECTED TO THE OUTPUT OF EACH OF SAID OSCILLATORS FOR DERIVING THE DIFFERENCE FREQUENCY IN ITS OUTPUT, AND A DISCRIMINATOR AND BANDPASS FILTER CONNECTED SERIALLY FROM SAID MIXER OUTPUT TO SAID TEST FREQUENCY CONTROL CIRCUITS IN A NEGATIVE FEEDBACK ARRANGEMENT, SAID BANDPASS FILTER PASSING FEEDBACK SIGNAL WITHIN THE RANGE OF FREQUENCIES OF SIGNALS APPLIED TO SAID TEST FREQUENCY CONTROL CIRCUIT.
Claim 2
Dependent Claim
151 words
A SIGNAL GENERATOR HAVING FIRST AND SECOND OSCILLATORS, A TEST FREQUENCY CONTROL CIRCUIT CONNECTED TO SAID FIRST OSCILLATOR FOR FREQUENCY MODULATING THE OUTPUT THEREOF, A SWEEP FREQUENCY CONTROL CIRCUIT ALSO CONNECTED TO SAID FIRST OSCILLATOR FOR SWEEPING THE CENTER FREQUENCY OF THE FREQUENCY MODULATED OUTPUT OVER A WIDE FREQUENCY RANGE, MEANS FOR SYNCHRONIZING THE FREQUENCY OF SAID SECOND OSCILLATOR WITH THE FREQUENCY OF SIGNAL GENERATED BY SAID FIRST OSCILLATOR OPERATIVE TO MAINTAIN THE DIFFERENCE IN FREQUENCY BETWEEN THE SIGNAL OF THE SECOND OSCILLATOR AND SAID SWEPT CENTER FREQUENCY CONSTANT, A MIXER CONNECTED TO THE OUTPUT OF EACH OF SAID OSCILLATORS FOR DERIVING THE DIFFERENCE FREQUENCY IN ITS OUTPUT, AND A DISCRIMINATOR AND BANDPASS FILTER CONNECTED SERIALLY FROM SAID MIXER OUTPUT TO SAID TEST FREQUENCY CONTROL CIRCUITS IN A NEGATIVE FEEDBACK ARRANGEMENT, SAID BANDPASS FILTER PASSING FEEDBACK SIGNAL WITHIN THE RANGE OF FREQUENCIES OF SIGNALS APPLIED TO SAID TEST FREQUENCY CONTROL CIRCUIT.
References Cited (Backward Citations)
US2794956A
Cited
US3221266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |