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Patent US3354403A successfully refreshed from Google Patents.
US3354403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter step-down frequency synthesizer
Assignee: Collins Radio Co
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Filing: 1966-11-23
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Granted: 1967-11-21
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Expires: 1986-11-23
Abstract
No abstract record available.
Inventors
- 👤 Tex C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:46
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/18; H03L7/183; H03L2207/00; H03L2207/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A DIGITAL FREQUENCY SYNTHESIZER COMPRISING A VOLTAGE CONTROLLED OSCILLATOR, THE OUTPUT OF SAID VOLTAGE CONTROLLED OSCILLATOR BEING CONTROLLABLE IN DISCRETE FREQUENCY STEPS OVER A PREDETERMINED FREQUENCY RANGE, THE OUTPUT FROM SAID VOLTAGE CONTROLLED OSCILLATOR APPLIED TO A FREQUENCY DIVIDING MEANS AND DIVIDED DOWN TO A PREDETERMINED FEEDBACK FREQUENCY EQUAL THAT OF SAID DISCRETE OUTPUT STEPS,A REFERENCE FREQUENCY SOURCE HAVING A FREQUENCY EQUAL THAT OF SAID FEEDBACK FREQUENCY, PHASE COMPARISON MEANS TO WHICH SAID REFERENCE FREQUENCY SOURCE AND SAID FEEDBACK SIGNAL ARE APPLIED, THE OUTPUT FROM SAID PHASE COMPARISON MEANS BEING APPLIED TO SAID VOLTAGE CONTROLLED OSCILLATOR TO COMPLETE A PHASE LOCKED LOOP BETWEEN THE OUTPUT AND INPUT OF SAID VARIABLE CONTROLLED OSCILLATOR, SAID FREQUENCY DIVIDING MEANS COMPRISING A FIXED DIVIDER RECEIVING THE OUTPUT FROM SAID VOLTAGE CONTROLLED OSCILLATOR AND DIVIDING THE FREQUENCY AND PHASE THEREOF BY A FACTOR, N1, A VARIABLE DIGITAL DIVIDER RECEIVING THE OUTPUT FROM SAID FIXED DIVIDER AND DIVIDING THE OUTPUT FROM SAID FIXED DIVIDER BY A PRESELECTED INTEGER N WHERE N IS DEFINED AS THE RATIO OF THE VOLTAGE CONTROLLED OSCILLATOR OUTPUT FRE-
Claim 2
Dependent Claim
177 words
A DIGITAL FREQUENCY SYNTHESIZER COMPRISING A VOLTAGE CONTROLLED OSCILLATOR, THE OUTPUT OF SAID VOLTAGE CONTROLLED OSCILLATOR BEING CONTROLLABLE IN DISCRETE FREQUENCY STEPS OVER A PREDETERMINED FREQUENCY RANGE, THE OUTPUT FROM SAID VOLTAGE CONTROLLED OSCILLATOR APPLIED TO A FREQUENCY DIVIDING MEANS AND DIVIDED DOWN TO A PREDETERMINED FEEDBACK FREQUENCY EQUAL THAT OF SAID DISCRETE OUTPUT STEPS,A REFERENCE FREQUENCY SOURCE HAVING A FREQUENCY EQUAL THAT OF SAID FEEDBACK FREQUENCY, PHASE COMPARISON MEANS TO WHICH SAID REFERENCE FREQUENCY SOURCE AND SAID FEEDBACK SIGNAL ARE APPLIED, THE OUTPUT FROM SAID PHASE COMPARISON MEANS BEING APPLIED TO SAID VOLTAGE CONTROLLED OSCILLATOR TO COMPLETE A PHASE LOCKED LOOP BETWEEN THE OUTPUT AND INPUT OF SAID VARIABLE CONTROLLED OSCILLATOR, SAID FREQUENCY DIVIDING MEANS COMPRISING A FIXED DIVIDER RECEIVING THE OUTPUT FROM SAID VOLTAGE CONTROLLED OSCILLATOR AND DIVIDING THE FREQUENCY AND PHASE THEREOF BY A FACTOR, N1, A VARIABLE DIGITAL DIVIDER RECEIVING THE OUTPUT FROM SAID FIXED DIVIDER AND DIVIDING THE OUTPUT FROM SAID FIXED DIVIDER BY A PRESELECTED INTEGER N WHERE N IS DEFINED AS THE RATIO OF THE VOLTAGE CONTROLLED OSCILLATOR OUTPUT FRE-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |