Patent US4875089A successfully refreshed from Google Patents.
US4875089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-standard vectorscope
Assignee: Magni Systems Inc
•
Filing: 1989-03-22
•
Granted: 1989-10-17
•
Expires: 2009-03-22
Abstract
Abstract A multistandard vectorscope providing vector displays of two or more composite video standards in a single vectorscope. The present invention utilizes a DC controlled phase shifter and a demodulator that are not frequency sensitive along with a switchable oscillator for switching between multiple video standards.
Inventors
- 👤 John L. Judge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A multi-standard vectorscope comprising demodulator means for receiving input video signals, switchable oscillator means connected to said demodulator means for generating at least first and second oscillator signals, said oscillator means connected to receive first and second standard color information signals which correspond to said first and second oscillator signals, respectively, control means for switching between said first and second oscillator signals depending upon whether said oscillator means receives said first or second standard signals, said demodulator means responsive to said first or second oscillator signals to demodulate said input video signals.
Claim 2
Dependent Claim
92 words
A multi-standard vectorscope comprising demodulator means for receiving input video signals, switchable oscillator means connected to said demodulator means for generating at least first and second oscillator signals, said oscillator means connected to receive first and second standard color information signals which correspond to said first and second oscillator signals, respectively, control means for switching between said first and second oscillator signals depending upon whether said oscillator means receives said first or second standard signals, said demodulator means responsive to said first or second oscillator signals to demodulate said input video signals.
Claim 3
Dependent Claim
19 words
A vectorscope as in claim 1 including phase shift network means to accommodate said first and second standard signals.
Claim 4
Dependent Claim
30 words
A vectorscope as in claim 2 including a DC controlled phase shifter that is not frequency sensitive, allowing a 360 degree phase shift of the display of any video standard.
Claim 5
Dependent Claim
30 words
A vectorscope as in claim 3 including divider means for dividing said first or second oscillator signals to a subcarrier frequency corresponding to said first or second standard signals, respectively.
Claim 6
Dependent Claim
20 words
A vectorscope as in claim 4 including means for applying a variable DC control signal to said phase shift means.
Claim 7
Dependent Claim
27 words
A vectorscope as in claim 5 including means for switching between different DC control voltages to allow display of non-timed inputs as if they were timed inputs.
References Cited (Backward Citations)
US2751429A
Cited
US3230304A
Cited
US3384706A
Cited
US3449510A
Cited
US3614304A
Cited
US3517116A
Cited
US3646254A
Cited
US3820156A
Cited
US4096514A
Cited
US4092666A
Cited
US4204220A
Cited
US4283738A
Cited
US4488168A
Cited
JPS5836074A
Cited
JPS58141092A
Cited
US4573086A
Cited
GB2126832A
Cited
US4792845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |