US3753109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peak detector
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1971-03-08
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Granted: 1973-08-14
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Expires: 1991-03-08
Abstract
Abstract Circuitry is provided for distinguishing peaks in the amplitude of a time-varying signal. The circuitry includes a peak follower comprising a capacitor charged through a diode for storing peak values of the signal. A valley detection circuit is provided for resetting the peak follower following the occurrence of a valley in the signal. This prepares the peak follower for a new peak. A peak is determined to have occurred when the signal drops to an amplitude which is less than a predetermined percentage of the amplitude stored in the capacitor. The percentage is made to drop drastically at low signal levels to prevent noise from resulting in false indications of peaks.
Inventors
- 👤 J Schainbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:59
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04; H; H03; H03K; H03K5/00; H03K5/153; H03K5/1536
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
The new use, for analysis of data represented by a timevarying signal the amplitude of which at all times in the duration of the signal is an analog of the same variable component of said data, of an apparatus for determining the occurrence of peaks in a signal comprising means receiving said signal and storing a representation of the maximum value of said signal in a period of time, means determining maxima in the value of said signal and providing an indication of a peak when a maximum is detected, means for detecting minima in the value of said signal and providing a resetting signal for each detected minimum, and means responsive to said resetting signal for resetting said receiving and storing means to a condition wherein it is capable of storing a representation of the next maximum, said new use comprising: a. introducing said time-varying signal into said apparatus as the signal involved, b. deriving from said apparatus an analog signal corresponding in magnitude to the last-stored maximum, c. deriving from the apparatus a command signal after a maximum is detected but before the receiving and storing means is reset, and d. recording the analog signal in response to said command signal.
Claim 2
Dependent Claim
203 words
The new use, for analysis of data represented by a timevarying signal the amplitude of which at all times in the duration of the signal is an analog of the same variable component of said data, of an apparatus for determining the occurrence of peaks in a signal comprising means receiving said signal and storing a representation of the maximum value of said signal in a period of time, means determining maxima in the value of said signal and providing an indication of a peak when a maximum is detected, means for detecting minima in the value of said signal and providing a resetting signal for each detected minimum, and means responsive to said resetting signal for resetting said receiving and storing means to a condition wherein it is capable of storing a representation of the next maximum, said new use comprising: a. introducing said time-varying signal into said apparatus as the signal involved, b. deriving from said apparatus an analog signal corresponding in magnitude to the last-stored maximum, c. deriving from the apparatus a command signal after a maximum is detected but before the receiving and storing means is reset, and d. recording the analog signal in response to said command signal.
Claim 3
Dependent Claim
194 words
The new use, for analysis of data represented by a time-varying signal the amplitude of which at all times in the duration of the signal is an analog of the same variable component of said data, of an apparatus for determining the occurrence of peaks in a signal comprising means receiving said signal and storing a representation of the maximum value of said signal in a period of time, means determining maxima in the value of said signal and providing an indication of a peak when a maximum is detected, means for detecting minima in the value of said signal and providing a resetting signal for each detected minimum, and means responsive to said resetting signal for resetting said receiving and storing means to a condition wherein it is capable of storing a representation of the next maximum, said new use comprising: a. introducing said time-varying signal into said apparatus as the signal involved, b. deriving from said apparatus an analog signal corresponding in magnitude to the last-stored maximum, c. deriving from the apparatus a command signal when said indication is provided, and d. recording the analog signal in response to said command signal.
Claim 4
Dependent Claim
194 words
The new use, for analysis of data represented by a time-varying signal the amplitude of which at all times in the duration of the signal is an analog of the same variable component of said data, of an apparatus for determining the occurrence of peaks in a signal comprising means receiving said signal and storing a representation of the maximum value of said signal in a period of time, means determining maxima in the value of said signal and providing an indication of a peak when a maximum is detected, means for detecting minima in the value of said signal and providing a resetting signal for each detected minimum, and means responsive to said resetting signal for resetting said receiving and storing means to a condition wherein it is capable of storing a representation of the next maximum, said new use comprising: a. introducing said time-varying signal into said apparatus as the signal involved, b. deriving from said apparatus an analog signal corresponding in magnitude to the last-stored maximum, c. deriving from the apparatus a command signal when said indication is provided, and d. recording the analog signal in response to said command signal.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |