US3312780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase detector for comparing a fixed frequency and a variable phase-frequency signal
Assignee: RCA Corp
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Filing: 1965-02-23
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Granted: 1967-04-04
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Robert N Hurst
- 👤 Lee V Hedlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:28
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/89; G; G01; G01R; G01R25/00; H03; H03D; H03D13/00; H03D13/005; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
AN APPARATUS FOR DETECTING THE PHASE DIFFERENCE BETWEEN A FIRST AND SECOND PULSE TRAIN COMPRISING, IN COMBINATION, A BISTABLE MULTIVIBRATOR HAVING FIRST AND SECOND STABLE STATES, MEANS RESPONSIVE TO SAID FIRST PULSE TRAIN FOR GENERATING A SAWTOOTH WAVEFORM HAVING A PERIOD EQUAL TO THAT OF SAID FIRST PULSE TRAIN, MEANS CONNECTED TO SAID MULTIVIBRATOR AND RESPONSIVE TO SAID FIRST PULSE TRAIN TO PLACE SAID MULTIVIBRATOR IN SAID FIRST STABLE STATE A GIVEN TIME AFTER EACH PULSE OF SAID FIRST PULSE TRAIN, MEANS CONNECTED TO SAID MULTIVIBRATOR AND RESPONSIVE TO SAID SECOND PULSE TRAIN FIRST TO PRODUCE AN OUTPUT PULSE OF GIVEN DURATION FOR EACH PULSE OF SAID SECOND PULSE TRAIN RECEIVED WHILE SAID MULTIVIBRATOR IS IN SAID FIRST STABLE STATE AND A GIVEN TIME THEREAFTER TO PLACE SAID MULTIVIBRATOR IN SAID SECOND STABLE STATE, MEANS RESPONSIVE TO SAID OUTPUT PULSES AND TO SAID SECOND PULSE TRAIN TO PRODUCE A SAMPLING PULSE FOR EACH PULSE IN SAID SECOND PULSE TRAIN OCCURRING AT THE RESPECTIVE TIMES OF AND CORRESPONDING TO SAID OUTPUT PULSES, AND MEANS RESPONSIVE TO SAID SAMPLING PULSES AND SAID SAWTOOTH WAVE TO PRODUCE AN ERROR SIGNAL REPRESENTATIVE OF THE PHASE DEVIATION OF ONE OF SAID PULSE TRAINS WITH RESPECT TO THE OTHER OF SAID PULSE TRAINS.
Claim 2
Independent Claim
207 words
AN APPARATUS FOR DETECTING THE PHASE DIFFERENCE BETWEEN A FIRST AND SECOND PULSE TRAIN COMPRISING, IN COMBINATION, A BISTABLE MULTIVIBRATOR HAVING FIRST AND SECOND STABLE STATES, MEANS RESPONSIVE TO SAID FIRST PULSE TRAIN FOR GENERATING A SAWTOOTH WAVEFORM HAVING A PERIOD EQUAL TO THAT OF SAID FIRST PULSE TRAIN, MEANS CONNECTED TO SAID MULTIVIBRATOR AND RESPONSIVE TO SAID FIRST PULSE TRAIN TO PLACE SAID MULTIVIBRATOR IN SAID FIRST STABLE STATE A GIVEN TIME AFTER EACH PULSE OF SAID FIRST PULSE TRAIN, MEANS CONNECTED TO SAID MULTIVIBRATOR AND RESPONSIVE TO SAID SECOND PULSE TRAIN FIRST TO PRODUCE AN OUTPUT PULSE OF GIVEN DURATION FOR EACH PULSE OF SAID SECOND PULSE TRAIN RECEIVED WHILE SAID MULTIVIBRATOR IS IN SAID FIRST STABLE STATE AND A GIVEN TIME THEREAFTER TO PLACE SAID MULTIVIBRATOR IN SAID SECOND STABLE STATE, MEANS RESPONSIVE TO SAID OUTPUT PULSES AND TO SAID SECOND PULSE TRAIN TO PRODUCE A SAMPLING PULSE FOR EACH PULSE IN SAID SECOND PULSE TRAIN OCCURRING AT THE RESPECTIVE TIMES OF AND CORRESPONDING TO SAID OUTPUT PULSES, AND MEANS RESPONSIVE TO SAID SAMPLING PULSES AND SAID SAWTOOTH WAVE TO PRODUCE AN ERROR SIGNAL REPRESENTATIVE OF THE PHASE DEVIATION OF ONE OF SAID PULSE TRAINS WITH RESPECT TO THE OTHER OF SAID PULSE TRAINS.
References Cited (Backward Citations)
US3100816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |