US3859602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for simulating the original shape of a signal which is distorted by peaks
Assignee: US Philips Corp
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Filing: 1973-03-05
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Granted: 1975-01-07
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Expires: 1993-03-05
Abstract
Abstract A device for simulating a distorted, exponentially decaying part of an input signal, comprising an RC-network having a controllable RC-time and a measuring member which converts the difference between the input signal and the generated signal into a control signal for the RC-network.
Inventors
- 👤 Frits Jacques Janssen
- 👤 Arnold Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; G; G06; G06G; G06G7/00; G06G7/48; G06G7/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
A device for simulating the shape of an input signal which includes a peak followed by a decaying part, at least the first portion of said decaying part decreasing exponentially and a subsequent portion of said decaying part being distorted, said device comprising a first switching member, a signal generator adapted to generate an exponentially decreasing signal that simulates the decaying part of the input signal without the distorted portion, means for selectively connecting an outgoing conductor via said first switching member to an incoming conductor which serves to supply the input signal and to the output of said signal generator, said signal generator comprising a capacitor which can be discharged via a resistance element, a second Periodically operating switching member for connecting said capacitor to the incoming conductor, means for adjusting the time constant of the network formed by the resistance element and the capacitor so as to match this time constant to that of the decaying part of the input signal, and means for connecting the incoming conductor and the output of the signal generator to first and second inputs, respectively, of a measuring member which derives a difference signal determined by the difference between the amplitudes of the signal generated by the signal generator and the input signal.
Claim 2
Independent Claim
211 words
A device for simulating the shape of an input signal which includes a peak followed by a decaying part, at least the first portion of said decaying part decreasing exponentially and a subsequent portion of said decaying part being distorted, said device comprising a first switching member, a signal generator adapted to generate an exponentially decreasing signal that simulates the decaying part of the input signal without the distorted portion, means for selectively connecting an outgoing conductor via said first switching member to an incoming conductor which serves to supply the input signal and to the output of said signal generator, said signal generator comprising a capacitor which can be discharged via a resistance element, a second Periodically operating switching member for connecting said capacitor to the incoming conductor, means for adjusting the time constant of the network formed by the resistance element and the capacitor so as to match this time constant to that of the decaying part of the input signal, and means for connecting the incoming conductor and the output of the signal generator to first and second inputs, respectively, of a measuring member which derives a difference signal determined by the difference between the amplitudes of the signal generated by the signal generator and the input signal.
Claim 3
Dependent Claim
57 words
A device as claimed in claim 1 wherein the measuring member comprises a first integrator for integrating said difference signal, and means connecting the output of said first integrator to a control input of the signal generator, the time constant of the resistor-capacitor network of the signal generator being dependent on the voltage at the control input.
Claim 4
Dependent Claim
140 words
A device as claimed in claim 1 further comprising, an amplifier connected between the output of the signal generator and the first switching member, the amplification of said amplifier being equal to two, means connecting the output of the amplifier to an input of a voltage comparison unit, means connecting the other input of the comparison unit to a storage element connected in circuit so as to store the value of the input signal at the instant at which the first switching member interrupts the connection between the incoming and the outgoing conductor, a third switching member, means connecting said voltage comparison unit to actuate the third switching member upon equality of the voltages at its two inputs, and means connecting the third switching member to the outgoing conductor to render same voltageless upon actuation of the third switching member.
Claim 5
Dependent Claim
153 words
A device as claimed in claim 2 further comprising an amplifier having an amplification factor of two and connected between the output of the signal generator and the first switching member, a voltage comparator having first and second inputs and an output, means connecting the output of the amplifier to the first input of the comparator, a storage element selectively coupled to the incoming conductor so as to store the input signal appearing thereat at the instant at which the first switching member interrupts the connection between the incoming and outgoing conductors, means connecting the second input of the comparator to the storage element, and a third switching member connected to the output of the comparator and to the outgoing conductor so as to remove the voltage from said outgoing conductor upon actuation of said third switching member caused by equality of the voltages at the first and second inputs of the comparator.
Claim 6
Dependent Claim
178 words
A signal simulation device for an input signal having a waveform with a peak followed by a decreasing exponential portion the terminal portion of which is distorted, said device comprising an input line at which the input signal appears and an output line, a signal generator adapted to generate a decreasing exponential signal that simulates the decreasing exponential portion of the input signal but without the distorted terminal portion, first switching means for selectively coupling the output line to the input line and to the output of the signal generator in mutually exclusive time intervals, said signal generator including an RC time constant network with a control input for adjusting the value of said time constant to vary the exponential waveform of said signal generator, a switching member for periodically connecting said RC network to the input line, and means coupled to the input line and the signal generator output and responsive to the signals thereat for deriving a control signal determined by the difference between the amplitudes of the signal generator output signal and the input signal.
Claim 7
Dependent Claim
178 words
A signal simulation device for an input signal having a waveform with a peak followed by a decreasing exponential portion the terminal portion of which is distorted, said device comprising an input line at which the input signal appears and an output line, a signal generator adapted to generate a decreasing exponential signal that simulates the decreasing exponential portion of the input signal but without the distorted terminal portion, first switching means for selectively coupling the output line to the input line and to the output of the signal generator in mutually exclusive time intervals, said signal generator including an RC time constant network with a control input for adjusting the value of said time constant to vary the exponential waveform of said signal generator, a switching member for periodically connecting said RC network to the input line, and means coupled to the input line and the signal generator output and responsive to the signals thereat for deriving a control signal determined by the difference between the amplitudes of the signal generator output signal and the input signal.
Claim 8
Dependent Claim
47 words
A device as claimed in claim 5 further comprising means responsive to said control signal for signalling said switching means to switch The connection of the output line from said input line to the output of the signal generator when said control signal achieves a predetermined value.
Claim 9
Dependent Claim
52 words
A device as claimed in claim 6 further comprising means for modifying said control signal to derive a second control signal, and means for applying said second control signal to the control input of said RC network to vary the RC time constant thereof as a function of said second control signal.
Claim 10
Dependent Claim
69 words
A device as claimed in claim 7 further comprising means controlled by the input signal appearing on the input line at the instant said switching means switches the output line to the output of the signal generator and by the output signal of the signal generator for coupling the output line to a point of fixed potential upon equality of the input signal and the signal generator output signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |