Patent US5557533A successfully refreshed from Google Patents.
US3636445A
Expired / Lapsed
US
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Nonrepetitive waveform parameter measurement
Assignee: Computer Test Corp
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Filing: 1969-04-03
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Granted: 1972-01-18
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Expires: 1989-04-03
Abstract
Abstract Analyzing a nonrepetitive waveform by measuring the value of the peak amplitude Ap of the waveform, the time duration tp between a predetermined time and the time that the peak amplitude occurs and the time duration ts between the predetermined time and the time that the peak amplitude has decreased to 10 percent of its peak value. The peak amplitude of the waveform is detected and delayed and the difference is derived between the delayed and undelayed peak signals to provide a zero crossing when the delayed peak signal reaches its peak and is equal to the undelayed peak signal. The zero crossing is detected and a command signal produced.
Inventors
- 👤 Sarkis Douaihy
- 👤 John F Renz
- 👤 William R Blatchley
- 👤 Terry W Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:10
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
198 words
A system for analyzing a nonrepetitive waveform by measuring the value of the peak amplitude Ap of said waveform and the time duration tp between a predetermined time and the time that said peak amplitude occurs comprising means for detecting said peak amplitude of said waveform and producing a peak signal at a detector output, first delay means for delaying said peak signal by a predetermined delay time, difference means connected to said first delay means and said detector output for deriving the difference between the delayed peak signal and the undelayed peak signal produced at said detector output, means connected to the output of said difference means to provide a first command signal at the time said delayed peak signal reaches the peak amplitude of said undelayed peak signal whereby the time interval between said first command signal and said predetermined time is equal to tp plus said predetermined delay time, second delay means for delaying said waveforms by said predetermined delay time to provide a delayed waveform, and means responsive to said first command signal for sampling said delayed waveform at the time of said first command signal for producing an analog signal proportional to Ap.
Claim 2
Independent Claim
198 words
A system for analyzing a nonrepetitive waveform by measuring the value of the peak amplitude Ap of said waveform and the time duration tp between a predetermined time and the time that said peak amplitude occurs comprising means for detecting said peak amplitude of said waveform and producing a peak signal at a detector output, first delay means for delaying said peak signal by a predetermined delay time, difference means connected to said first delay means and said detector output for deriving the difference between the delayed peak signal and the undelayed peak signal produced at said detector output, means connected to the output of said difference means to provide a first command signal at the time said delayed peak signal reaches the peak amplitude of said undelayed peak signal whereby the time interval between said first command signal and said predetermined time is equal to tp plus said predetermined delay time, second delay means for delaying said waveforms by said predetermined delay time to provide a delayed waveform, and means responsive to said first command signal for sampling said delayed waveform at the time of said first command signal for producing an analog signal proportional to Ap.
Claim 3
Dependent Claim
104 words
The system of claim 1 in which there is provided means for dividing by 10 said Ap signal, and additional difference means for deriving the difference between said divided Ap signal and said delayed waveform to produce a second command signal at the time the delayed waveform has decreased in an absolute direction to 10 percent of its peak value whereby the time duration of said second command signal with respect to said predetermined time is equal to the time duration ts between the time of occurrence of said 10 percent peak value with respect to said predetermined time plus said predetermined delay time.
Claim 4
Dependent Claim
59 words
The system of claim 2 in which there is provided means for producing a time signal at said predetermined time, third delay means for delaying said time signal by said predetermined delay time, means including a storage circuit for producing a first analog stored signal having a value proportional to said predetermined delay time by a predetermined proportionality constant.
Claim 5
Dependent Claim
49 words
The system of claim 3 in which there is provided first storage means coupled to said difference means connected to said first delay means for producing a second analog stored signal proportional to by said proportionality constant the time interval between said first command signal and said predetermined time.
Claim 6
Dependent Claim
44 words
The system of claim 4 in which there is provided second storage means connected to said additional difference means for providing a third analog stored signal proportional to by said proportionality constant the time interval between said second command signal and said predetermined time.
Claim 7
Dependent Claim
34 words
The system of claim 5 in which there is provided first differential means for deriving the difference between said first and second analog signals to produce a signal proportional to the value of tp.
Claim 8
Dependent Claim
34 words
The system of claim 6 in which there is provided second differential means for deriving the difference between said first and third analog signals to produce a signal proportional to the value of ts.
Claim 9
Dependent Claim
72 words
The system of claim 1 in which said difference means includes a differential amplifier for deriving the difference between said delay peak signal and said undelayed peak signal whereby as said delayed peak signal reaches its peak amplitude the output of said amplifier decreases in an absolute direction until zero, a zero threshold dEtector for producing said first command signal when the difference between said delayed and undelayed peak signals reaches zero.
Claim 10
Dependent Claim
41 words
The system of claim 7 in which there is provided multiplexing means for connecting to said first and second differential means and to said sampling means for producing at an output in a predetermined sequence said Ap, tp and ts signals.
Claim 11
Independent Claim
291 words
A system for analyzing a nonrepetitive waveform produced in the output circuit of a magnetic memory element by measuring the value of the peak amplitude of said waveform, the time interval tp between a predetermined time and the time that said peak amplitude occurs and the time interval ts between said predetermined time and the time that said peak amplitude has decreased in an absolute direction to 10 percent of said peak value comprising means for detecting said peak amplitude of said waveform and producing a peak signal at a detector output, first delay means connected to said detector output for delaying said peak signal by a predetermined delay time, first difference means connected to said first delay means and said detector output for deriving the algebraic difference between the delayed peak signal and the undelayed peak signal produced at said detector output, means connected to the output of said first difference means to provide a first command signal produced at the time said delayed peak signal reaches the peak amplitude of said undelayed peak signal whereby the time interval between the occurrence of said first command signal and said predetermined time is equal to tp plus said predetermined delay time, second delay means for delaying said waveform by said predetermined delay time, means responsive to said first command signal for sampling said delayed waveform at the time of said first command signal for producing an analog signal proportional to Ap, and means for dividing by 10 said Ap signal, second difference means for deriving the difference between said 10 percent Ap signal and said delayed waveform to produce a second command signal at the time said delayed waveform has decreased in an absolute direction to said 10 percent peak value.
Claim 12
Independent Claim
291 words
A system for analyzing a nonrepetitive waveform produced in the output circuit of a magnetic memory element by measuring the value of the peak amplitude of said waveform, the time interval tp between a predetermined time and the time that said peak amplitude occurs and the time interval ts between said predetermined time and the time that said peak amplitude has decreased in an absolute direction to 10 percent of said peak value comprising means for detecting said peak amplitude of said waveform and producing a peak signal at a detector output, first delay means connected to said detector output for delaying said peak signal by a predetermined delay time, first difference means connected to said first delay means and said detector output for deriving the algebraic difference between the delayed peak signal and the undelayed peak signal produced at said detector output, means connected to the output of said first difference means to provide a first command signal produced at the time said delayed peak signal reaches the peak amplitude of said undelayed peak signal whereby the time interval between the occurrence of said first command signal and said predetermined time is equal to tp plus said predetermined delay time, second delay means for delaying said waveform by said predetermined delay time, means responsive to said first command signal for sampling said delayed waveform at the time of said first command signal for producing an analog signal proportional to Ap, and means for dividing by 10 said Ap signal, second difference means for deriving the difference between said 10 percent Ap signal and said delayed waveform to produce a second command signal at the time said delayed waveform has decreased in an absolute direction to said 10 percent peak value.
Claim 13
Dependent Claim
42 words
The system of claim 10 in which detecting means includes a peak detector circuit having charging means which is continually charged by said waveform until said peak amplitude is reached thereby to provide a substantially constant peak signal at said detector output.
Claim 14
Dependent Claim
54 words
The system of claim 10 in which there is provided means for producing a time signal at said predetermined time, third delay means for delaying said time signal by said predetermined delay time, means for producing a first analog signal having a value proportional to said predetermined time delay by a predetermined proportionally constant.
Claim 15
Dependent Claim
45 words
The system of claim 12 in which there is provided first storage means connected to said first difference means for producing a second analog signal proportional to by said proportionality constant the time duration of said first command signal with respect to said predetermined time.
Claim 16
Independent Claim
136 words
A method for analyzing a nonrepetitive waveform by measuring the value of the peak amplitude Ap of said waveform and the time duration tp between a predetermined time and the time that said peak amplitude occurs which comprises the steps of detecting the peak amplitude of the waveform and producing a peak signal, delaying the peak signal by a predetermined delay time, deriving the difference between the delayed peak signal and the peak signal that has not been delayed, producing a signal which crosses a threshold when the delayed peak signal reaches the peak amplitude of the undelayed peak signal, detecting the threshold and producing a command signal, delaying the waveform by said predetermined delay time, and sampling the delayed waveform at the time of thE command signal and producing an analog signal proportional to Ap.
Claim 17
Independent Claim
136 words
A method for analyzing a nonrepetitive waveform by measuring the value of the peak amplitude Ap of said waveform and the time duration tp between a predetermined time and the time that said peak amplitude occurs which comprises the steps of detecting the peak amplitude of the waveform and producing a peak signal, delaying the peak signal by a predetermined delay time, deriving the difference between the delayed peak signal and the peak signal that has not been delayed, producing a signal which crosses a threshold when the delayed peak signal reaches the peak amplitude of the undelayed peak signal, detecting the threshold and producing a command signal, delaying the waveform by said predetermined delay time, and sampling the delayed waveform at the time of thE command signal and producing an analog signal proportional to Ap.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |