US3403355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase control circuit
Assignee: Fujitsu Ltd
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Filing: 1966-01-12
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Granted: 1968-09-24
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Expires: 1986-01-12
Abstract
No abstract record available.
Inventors
- 👤 Takada Yuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A PHASE CONTROL CIRCUIT FOR CONTROLLING THE PHASE OF A CARRIER WAVE RELATIVE TO A PAIR OF INPUT SIGNAL, SAID PHASE CONTROL CIRCUIT COMPRISING: INPUT MEANS FOR SAID INPUT SIGNALS; OUTPUT MEANS FOR PROVIDING FROM SAID INPUT SIGNALS OUTPUT SIGNALS; CONTROLLABLE CARRIER WAVE GENERATING MEANS HAVING AN INPUT AND AN OUTPUT COUPLED TO SAID INPUT MEANS FOR PROVIDING A CARRIER WAVE FOR SAID INPUT SIGNALS; AND CONTROL MEANS HAVING AN INPUT COUPLED BETWEEN SAID INPUT MEANS AND SAID OUTPUT MEANS AND AN OUTPUT COUPLED TO THE INPUT OF SAID CARRIER WAVE GENERATING MEANS FOR CONTROLLING THE FREQUENCY AND PHASE OF SAID CARRIER WAVE GENERATING MEANS, SAID CONTROL MEANS COMPRISING CONVERTING MEANS FOR PROVIDING A PAIR OF PULSES HAVING DURATIONS DEPENDENT UPON THE MAGNITUDES OF VOLTAGES DERIVED FROM SAID INPUT SIGNALS AND ADDER MEANS COUPLED BETWEEN SAID CONVERTING MEANS AND THE INPUT OF SAID CARRIER WAVE GENERATING MEANS FOR PROVIDING A CONTROL VOLTAGE DEPENDENT UPON THE DIFFERENCE IN DURATION OF THE PAIR OF PULSES PROVIDED BY SAID CONVERTING MEANS TO CONTROL THE FREQUENCY AND PHASE OF SAID CARRIER WAVE GENERATING MEANS.
Claim 2
Dependent Claim
180 words
A PHASE CONTROL CIRCUIT FOR CONTROLLING THE PHASE OF A CARRIER WAVE RELATIVE TO A PAIR OF INPUT SIGNAL, SAID PHASE CONTROL CIRCUIT COMPRISING: INPUT MEANS FOR SAID INPUT SIGNALS; OUTPUT MEANS FOR PROVIDING FROM SAID INPUT SIGNALS OUTPUT SIGNALS; CONTROLLABLE CARRIER WAVE GENERATING MEANS HAVING AN INPUT AND AN OUTPUT COUPLED TO SAID INPUT MEANS FOR PROVIDING A CARRIER WAVE FOR SAID INPUT SIGNALS; AND CONTROL MEANS HAVING AN INPUT COUPLED BETWEEN SAID INPUT MEANS AND SAID OUTPUT MEANS AND AN OUTPUT COUPLED TO THE INPUT OF SAID CARRIER WAVE GENERATING MEANS FOR CONTROLLING THE FREQUENCY AND PHASE OF SAID CARRIER WAVE GENERATING MEANS, SAID CONTROL MEANS COMPRISING CONVERTING MEANS FOR PROVIDING A PAIR OF PULSES HAVING DURATIONS DEPENDENT UPON THE MAGNITUDES OF VOLTAGES DERIVED FROM SAID INPUT SIGNALS AND ADDER MEANS COUPLED BETWEEN SAID CONVERTING MEANS AND THE INPUT OF SAID CARRIER WAVE GENERATING MEANS FOR PROVIDING A CONTROL VOLTAGE DEPENDENT UPON THE DIFFERENCE IN DURATION OF THE PAIR OF PULSES PROVIDED BY SAID CONVERTING MEANS TO CONTROL THE FREQUENCY AND PHASE OF SAID CARRIER WAVE GENERATING MEANS.
References Cited (Backward Citations)
US2824287A
Cited
US2856529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |