Patent US5592390A successfully refreshed from Google Patents.
US5592390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time based method for analyzing a waveform
Assignee: Venturedyne Ltd
•
Filing: 1995-09-29
•
Granted: 1997-01-07
•
Expires: 2015-09-29
Abstract
Abstract A new method for analyzing an electrical waveform of the type portrayed on a graph includes the steps of selecting a waveform to be analyzed, establishing the boundary of a window-like area and generating a signal if the waveform is in a predetermined position with respect to the area. For example, a signal such as a failure signal is generated if the waveform is to be out of the area but, in fact, is in the area. The method also includes features for determining certain parameters, e.g., rise time, period and the like, for the waveform. The steps include selecting first and second points on the waveform and determining the time lapsed between points. Details regarding the structure of a new waveform analyzer are also disclosed.
Inventors
- 👤 Peter A. Liken
- 👤 Mark C. Jacobs
- 👤 Monte E. Van Nortwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:17
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/02; G01R29/027; G01R23/00; G01R23/16; G01R13/00; G01R13/20; G01R13/22; G01R13/34; G01R13/345
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A method for stress-screening a circuit board by analyzing a circuit board waveform having waveform points which are spaced in time, the method including the steps of: placing the circuit board in a test chamber; displaying the circuit board waveform on a graph; establishing a first graphic boundary circumscribing a first point on the waveform; establishing a second graphic boundary circumscribing a second point on the waveform; and generating an error signal if one of the points moves outside its graphic boundary.
Claim 2
Independent Claim
82 words
A method for stress-screening a circuit board by analyzing a circuit board waveform having waveform points which are spaced in time, the method including the steps of: placing the circuit board in a test chamber; displaying the circuit board waveform on a graph; establishing a first graphic boundary circumscribing a first point on the waveform; establishing a second graphic boundary circumscribing a second point on the waveform; and generating an error signal if one of the points moves outside its graphic boundary.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the generating step includes generating an error signal if the first point moves outside the first graphic boundary.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the generating step includes generating an error signal if the second point moves outside the second graphic boundary.
Claim 5
Dependent Claim
30 words
The method of claim 1 wherein the generating step includes generating an error signal if both the first and second points move outside the first and second graphic boundaries, respectively.
Claim 6
Dependent Claim
71 words
The method of claim 1 wherein: the graph has an "X" axis; the first point has a time-related "X" coordinate representing an event time; and the boundary establishing step includes the step of: selecting a first sample time and a second sample time with respect to the "X" axis; and the first sample time is earlier than the event time and the second sample time is later than the event time.
Claim 7
Dependent Claim
77 words
The method of claim 1 wherein: the graph has a "Y" axis; the first point has an amplitude-related "Y" coordinate representing an amplitude; and the boundary establishing step includes the step of: selecting, with respect to the "Y" axis, a first sample amplitude and a second sample amplitude, and wherein: the first sample amplitude is less than the amplitude of the first point and the second sample amplitude is greater than the amplitude of the first point.
References Cited (Backward Citations)
US4855722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |