US4614973A
Expired / Lapsed
US
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Method and apparatus for generating timing pulses
Assignee: Tektronix Inc
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Filing: 1983-09-28
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Granted: 1986-09-30
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Expires: 2003-09-28
Abstract
Abstract Timing pulses are generated in response to an input signal which includes a train of nominally periodic pulses by determining whether a detected pulse of the input signal is a pulse of the train of nominally periodic pulses, employing a detected pulse of the pulse train to initiate cyclical production of pulses with a period dependent on the nominal period of the pulse train, and using the cyclically produced pulses to generate the desired timing pulses. In a gen-lock circuit, this arrangement facilitates acquiring lock to a noisy signal.
Inventors
- 👤 Greg A. Sorenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:07
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/067; H04N5/073
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A method of generating timing pulses in response to an input signal which includes a train of nominally periodic pulses, comprising detecting a pulse of the input signal, determining whether the detected pulse is a pulse of said train of nominally periodic pulses, employing a detected pulse of said pulse train to initiate cyclical production of pulses with a period dependent on the nominal period of said pulse train, and using the cyclically produced pulses to generate said timing pulses.
Claim 2
Independent Claim
80 words
A method of generating timing pulses in response to an input signal which includes a train of nominally periodic pulses, comprising detecting a pulse of the input signal, determining whether the detected pulse is a pulse of said train of nominally periodic pulses, employing a detected pulse of said pulse train to initiate cyclical production of pulses with a period dependent on the nominal period of said pulse train, and using the cyclically produced pulses to generate said timing pulses.
Claim 3
Dependent Claim
91 words
Apparatus for generating timing pulses in response to an input signal which includes a train of nominally periodic pulses, comprising: first means for detecting a pulse of the input signal; second means for determining whether the detected pulse is a pulse of said train of nominally periodic pulses; third means for employing a detected pulse of said pulse train to initiate cyclical production of pulses with a period dependent on the nominal period of said pulse train; and fourth means for using the cyclically produced pulses to generate said timing pulses.
Claim 4
Dependent Claim
91 words
Apparatus for generating timing pulses in response to an input signal which includes a train of nominally periodic pulses, comprising: first means for detecting a pulse of the input signal; second means for determining whether the detected pulse is a pulse of said train of nominally periodic pulses; third means for employing a detected pulse of said pulse train to initiate cyclical production of pulses with a period dependent on the nominal period of said pulse train; and fourth means for using the cyclically produced pulses to generate said timing pulses.
Claim 5
Dependent Claim
80 words
Apparatus according to claim 2, wherein the input signal is a sequence of digital pulses provided by a video sync separator, and said first means comprise an edge detection and level qualification block for providing a first pulse at the leading edge of a pulse of the input signal and a second pulse which commences only after the pulse of the input signal has lasted a duration such that it probably represents a sync pulse of the input video signal.
References Cited (Backward Citations)
US3727142A
Cited
US4232267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |