Patent US3822399A successfully refreshed from Google Patents.
US3822399A
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Circuitry for detecting maximum values of a signal sequence
Assignee: Hewlett Packard GmbH Germany
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Filing: 1972-08-28
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Granted: 1974-07-02
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Expires: 1992-08-28
Abstract
Abstract Circuitry for the determination of the instants of, and the time intervals between, maximum values of signals of varying amplitude and wave form includes an idealized diode connected to a capacitor. A discriminator responsive to the termination of the charging current to the capacitor actuates a delay circuit. If no greater amplitude appears during the delay period, a switch activates a pulse generator to deliver an impulse indicative of the instant the maximum value appeared.
Inventors
- 👤 S Traub
- 👤 H Zeeb
- 👤 K Grund
- 👤 E Courtin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:36
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532; A; A61; A61B; A61B5/00; A61B5/02; A61B5/024
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising: energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal, said discriminator means including an operational amplifier having two negative feedback loops, each of which has an oppositely polarized non-linear element, said operational amplifier being biased by an electrical signal opposite to the energizing current; and discharging means connected to de-energize the energy-storage means in response to an output trigger produced by said discriminator means.
Claim 2
Dependent Claim
125 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising: energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal, said discriminator means including an operational amplifier having two negative feedback loops, each of which has an oppositely polarized non-linear element, said operational amplifier being biased by an electrical signal opposite to the energizing current; and discharging means connected to de-energize the energy-storage means in response to an output trigger produced by said discriminator means.
Claim 3
Dependent Claim
11 words
Circuitry as in claim 1 wherein the two elements are diodes.
Claim 4
Dependent Claim
90 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising: energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal; and discharging means connected to de-energize the energy-storage means in response to an output trigger produced by said discriminator means.
Claim 5
Dependent Claim
90 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising: energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal; and discharging means connected to de-energize the energy-storage means in response to an output trigger produced by said discriminator means.
Claim 6
Dependent Claim
40 words
Circuitry as in claim 3 comprising delay means connected between said discriminator means and said discharging means for activating said discharging means to de-energize said energy-storage means at a time after said output trigger is produced by said discriminator means.
Claim 7
Dependent Claim
194 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising; energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal; discharging means connected to de-energize the energy-storage means in response to an activating signal applied thereto; and delay means connected between said discriminator means and said discharging means for activating said discharging means to de-energize said energy-storage means at a time after said output trigger is produced by said discriminator means, said delay means including a comparator, a source of reference signal connected to said comparator, and an actuatable source of time-varying signal connected to said comparator, said source of time-varying signal becoming actuated to apply time-varying signal to said comparator in response said output trigger from the discriminator means, and said comparator applying activating signal to said discharge means in response to said time-varying signal and said reference signal attaining a predetermined relationship.
Claim 8
Dependent Claim
194 words
Circuitry for determining the times at which the maximum values of a sequence of signals occur, comprising; energy-storage means; rectifier means connected to receive the sequence of applied signals for energizing the energy-storage means during the period the applied signal is attaining peak value; discriminator means connected to said storage means for producing an output trigger in response to the energizing current attaining substantially zero value on an applied signal; discharging means connected to de-energize the energy-storage means in response to an activating signal applied thereto; and delay means connected between said discriminator means and said discharging means for activating said discharging means to de-energize said energy-storage means at a time after said output trigger is produced by said discriminator means, said delay means including a comparator, a source of reference signal connected to said comparator, and an actuatable source of time-varying signal connected to said comparator, said source of time-varying signal becoming actuated to apply time-varying signal to said comparator in response said output trigger from the discriminator means, and said comparator applying activating signal to said discharge means in response to said time-varying signal and said reference signal attaining a predetermined relationship.
Claim 9
Dependent Claim
29 words
Circuitry as in claim 3 wherein the discriminator means includes an operational amplifier having a negative feedback loop and biased by an electrical signal opposite to the energizing current.
Claim 10
Dependent Claim
47 words
Circuitry as in claim 3 wherein the rectifier means includes: an operational amplifier; a diode connected in series with the operational amplifier; a resistor; an impedance transformer connected in series with the resistor; and the amplifier-diode series combination and the transformer-resistor series combination are connected in paraLlel.
Claim 11
Dependent Claim
18 words
Circuitry as in claim 7 wherein the impedance transformer includes an operational amplifier with a negative feedback loop.
Claim 12
Dependent Claim
12 words
Circuitry as in claim 3 wherein said energy-storage means includes a capacitor.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |