US4761640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning cursors at specific points on a waveform display
Assignee: Tektronix Inc
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Filing: 1987-03-24
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Granted: 1988-08-02
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Expires: 2007-03-24
Abstract
Abstract A method for positioning cursors at a specific point on a displayed waveform uses a cursor to determine the maximum and minimum points on the waveform about a transition portion. For each position of the cursor between the maximum and minimum points an intersection between the cursor and the waveform is computed as a percentage of the difference between the maximum and minimum points. The cursor is then positioned at a point on the transition portion where the percentage is a desired value for the specific point.
Inventors
- 👤 Keith R. Slavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A method for positioning a vertical cursor at a specific point of a waveform on a display comprising the steps of: positioning the vertical cursor relative to the waveform at an extreme amplitude point of a transition in the waveform to store a first value representing such extreme amplitude point; positioning the vertical cursor relative to the waveform at an opposite extreme amplitude point of the transition in the waveform to store a second value representing such opposite extreme amplitude point; computing and displaying for each position of the vertical cursor with respect to the waveform between the extreme amplitude points a third value as a percentage of the difference between the first and second values; and positioning the vertical cursor relative to the waveform at a point on the waveform where the percentage is a desired value for the specific point.
Claim 2
Independent Claim
142 words
A method for positioning a vertical cursor at a specific point of a waveform on a display comprising the steps of: positioning the vertical cursor relative to the waveform at an extreme amplitude point of a transition in the waveform to store a first value representing such extreme amplitude point; positioning the vertical cursor relative to the waveform at an opposite extreme amplitude point of the transition in the waveform to store a second value representing such opposite extreme amplitude point; computing and displaying for each position of the vertical cursor with respect to the waveform between the extreme amplitude points a third value as a percentage of the difference between the first and second values; and positioning the vertical cursor relative to the waveform at a point on the waveform where the percentage is a desired value for the specific point.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |