US3668532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peak detection system
Assignee: Unisys Corp
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Filing: 1971-01-25
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Granted: 1972-06-06
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Expires: 1991-01-25
Abstract
Abstract A system for detecting the peaks in an analog signal whose amplitude varies with respect to time. The system employs a delta differentiation technique to develop two separate binary differential signals; i.e., a first highly accurate short time constant differential signal and a second relatively noise immune long time constant differential signal. The two differential signals are then logically combined to yield a relatively noise immune output signal which accurately indicates the peaks in the analog signal.
Inventors
- 👤 Hanan Potash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
219 words
A system for detecting the peaks in an analog signal whose amplitude varies with respect to time, said system comprising: first means for comparing the amplitude of said analog signal at time (t) with the amplitude of said analog signal at time (t+ Delta T1) and for providing a first binary differential signal having a first level when the amplitude at time (t) exceeds the amplitude at time (t+ Delta T1) and a second level when the amplitude at time (t+ Delta T1) exceeds the amplitude at time (t); second means for comparing the amplitude of said analog signal at time (t) with the amplitude of said analog signal at time (t+ Delta T2) and for providing a second binary differential signal having a first level when the amplitude at time (t) exceeds the amplitude at time (t+ Delta T2) and a second level when the amplitude at time (t+ Delta T2) exceeds the amplitude at time (t); device means providing an output signal capable of defining at least first and second levels; and logic means responsive to said first and second differential signals simultaneously defining first levels for switching said device means output signal to said first level and to said differential signals simultaneously defining second levels for switching said device means output signal to said second level.
Claim 2
Independent Claim
219 words
A system for detecting the peaks in an analog signal whose amplitude varies with respect to time, said system comprising: first means for comparing the amplitude of said analog signal at time (t) with the amplitude of said analog signal at time (t+ Delta T1) and for providing a first binary differential signal having a first level when the amplitude at time (t) exceeds the amplitude at time (t+ Delta T1) and a second level when the amplitude at time (t+ Delta T1) exceeds the amplitude at time (t); second means for comparing the amplitude of said analog signal at time (t) with the amplitude of said analog signal at time (t+ Delta T2) and for providing a second binary differential signal having a first level when the amplitude at time (t) exceeds the amplitude at time (t+ Delta T2) and a second level when the amplitude at time (t+ Delta T2) exceeds the amplitude at time (t); device means providing an output signal capable of defining at least first and second levels; and logic means responsive to said first and second differential signals simultaneously defining first levels for switching said device means output signal to said first level and to said differential signals simultaneously defining second levels for switching said device means output signal to said second level.
Claim 3
Dependent Claim
22 words
The system of claim 1 wherein the time interval at Delta T1 is considerably greater than the time interval at Delta T2.
Claim 4
Dependent Claim
25 words
The system of claim 1 including means for filtering out high frequency components from said analog signal prior to applying it to said first means.
Claim 5
Independent Claim
143 words
A system useful in combination with a magnetic read head for detecting the peaks in an output signal provided thereby whose amplitude can vary with respect to time, said system comprising: first means producing a first differential signal representative of the polarity of the amplitude difference of said output signal at two points in time (t) and (t+ Delta T1); second means producing a second differential signal representative of the polarity of the amplitude difference of said output signal at two points in time (t) and (t+ Delta T2); and third means responsive to said first and second differential signals for producing a logic output signal which defines a first state when the polarity represented by both said first and second differential signals is positive and a second state when the polarity represented by both said first and second differential signals is negative.
Claim 6
Independent Claim
143 words
A system useful in combination with a magnetic read head for detecting the peaks in an output signal provided thereby whose amplitude can vary with respect to time, said system comprising: first means producing a first differential signal representative of the polarity of the amplitude difference of said output signal at two points in time (t) and (t+ Delta T1); second means producing a second differential signal representative of the polarity of the amplitude difference of said output signal at two points in time (t) and (t+ Delta T2); and third means responsive to said first and second differential signals for producing a logic output signal which defines a first state when the polarity represented by both said first and second differential signals is positive and a second state when the polarity represented by both said first and second differential signals is negative.
Claim 7
Dependent Claim
54 words
The system of claim 4 wherein said first and second differential signals respectively produced by said first and second means are each binary signals having a first level when the polarity of the amplitude difference represented thereby is positive and a second level when the polarity of the amplitude difference represented thereby is negative.
Claim 8
Dependent Claim
69 words
The system of claim 5 wherein said third means includes a flip-flop capable of selectively defining set and reset states; and logic gate means responsive to said first and second differential signals for switching said flip-flop to said set state when said first and second differential signals simultaneously define said first level and to said reset state when said first and second differential signals simultaneously define said second level.
Claim 9
Dependent Claim
14 words
The system of claim 6 wherein Delta T1 > or = 3 Delta T2.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |