US3290678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for correcting the local oscillator frequency in a radar system
Assignee: US Philips Corp
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Filing: 1965-02-05
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Granted: 1966-12-06
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Expires: 1985-02-05
Abstract
No abstract record available.
Inventors
- 👤 Carlsson Nils Rune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/24; G01S7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A RADAR SYSTEM COMPRISING A TRANSMITTER AND A RECEIVER, SAID TRANSMITTER COMPRISING MEANS FOR SEQUENTIALLY TRANSMITTING PULSES OF HIGH-FREQUENCY ENERGY OF VARYING FREQUENCY, SAID RECEIVER COMPRISING MEANS FOR RECEIVING ECHO SIGNALS, LOCAL OSCILLATOR MEANS INCLUDING VOLTAGE RESPONSIVE MEANS FOR VARYING THE FREQUENCY OF OSCILLATION OF SAID OSCILLATOR MEANS, MIXER MEANS, MEANS APPLYING SAID ECHO SIGNALS AND THE OUTPUT OF SAID OSCILLATOR MEANS TO SAID MIXER MEANS FOR PRODUCING AN INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR PRODUCING A FIRST CONTROL VOLTAGE RESPONSIVE TO THE INSTANTANEOUS DIFFERENCE BETWEEN THE FREQUENCY OF SAID OSCILLATIONS AND THE FREQUENCY OF SAID PULSES UPON THE OCCURRENCE OF EACH PULSE, MEANS FOR APPLYING SAID FIRST CONTROL VOLTAGE TO SAID VOLTAGE RESPONSSIVE MEANS, WHEREBY THE FREQUENCY OF SAID OSCILLATIONS IS ADJUSTED TO PRODUCE INTERMEDIATE FREQUENCY SIGNALS OF SUBSTANTIALLY CONSTANT FREQUENCY, MEANS FOR PRODUCING A SECOND CONTROL VOLTAGE RESPONSIVE TO THE AVERAGE DIFFERENCE BETWEEN SAID LOCAL OSCILLATOR FREQUENCY AND THE FREQUNCY
Claim 2
Dependent Claim
151 words
A RADAR SYSTEM COMPRISING A TRANSMITTER AND A RECEIVER, SAID TRANSMITTER COMPRISING MEANS FOR SEQUENTIALLY TRANSMITTING PULSES OF HIGH-FREQUENCY ENERGY OF VARYING FREQUENCY, SAID RECEIVER COMPRISING MEANS FOR RECEIVING ECHO SIGNALS, LOCAL OSCILLATOR MEANS INCLUDING VOLTAGE RESPONSIVE MEANS FOR VARYING THE FREQUENCY OF OSCILLATION OF SAID OSCILLATOR MEANS, MIXER MEANS, MEANS APPLYING SAID ECHO SIGNALS AND THE OUTPUT OF SAID OSCILLATOR MEANS TO SAID MIXER MEANS FOR PRODUCING AN INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR PRODUCING A FIRST CONTROL VOLTAGE RESPONSIVE TO THE INSTANTANEOUS DIFFERENCE BETWEEN THE FREQUENCY OF SAID OSCILLATIONS AND THE FREQUENCY OF SAID PULSES UPON THE OCCURRENCE OF EACH PULSE, MEANS FOR APPLYING SAID FIRST CONTROL VOLTAGE TO SAID VOLTAGE RESPONSSIVE MEANS, WHEREBY THE FREQUENCY OF SAID OSCILLATIONS IS ADJUSTED TO PRODUCE INTERMEDIATE FREQUENCY SIGNALS OF SUBSTANTIALLY CONSTANT FREQUENCY, MEANS FOR PRODUCING A SECOND CONTROL VOLTAGE RESPONSIVE TO THE AVERAGE DIFFERENCE BETWEEN SAID LOCAL OSCILLATOR FREQUENCY AND THE FREQUNCY
References Cited (Backward Citations)
US3163862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |