US3753105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for varying an oscilloscopic trace
Assignee: Wandel and Golterman GmbH and Co
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Filing: 1971-10-22
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Granted: 1973-08-14
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Expires: 1991-10-22
Abstract
Abstract The beam of a cathode-ray tube, normally suppressed, is electromagnetically deflected by a triangular current in the x direction and by a sinusoidal current in the y direction, thereby producing an invisible grid on the oscilloscope screen. Whenever the y-deflection signal matches either an input signal to be visualized or a selected reference signal, the beam is turned on for a small fraction of a y-sweep cycle to produce part of a luminous trace, representing the input signal, and a straight base line corresponding to the reference signal. In order to vary the position and/or the scale of representation of the trace with maintenance of its correct position relative to the base line, the y-deflection signal is subjected to multiplicative and/or additive modification.
Inventors
- 👤 P Harzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:12
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
228 words
In an oscilloscope, in combination: a cathode-ray tube provided with a screen and with an electron gun for training a beam upon said screen; a first sweep circuit for displacing said beam in an x direction at a relatively slow rate; a source of reference signal providing a standard of evaluation for said input signal; a second sweep circuit for oscillating said beam at a relatively fast rate in a y-direction orthogonal to said x-direction, said source of reference signal including rectifier means connected across said second sweep circuit for developing a supply voltage dependent upon the sweep in said y-direction ; brightness-control means for normally keeping said beam substantially suppressed; a source of input signal to be graphically represented on said screen; comparison means connected to said second sweep circuit and to said sources for briefly operating said brightness-control means to brighten said beam upon the deflection of the beam in said y-direction bearing a predetermined relationship to the output of either of said sources, thereby generating on said screen a visible trace of said input signal and a visible base line; and adjustable impedance means in the connection between said comparison means and said second sweep circuit for jointly varying the appearance of said trace and said base line in a correlated manner, said impedance means lying between said second sweep circuit and said rectifier means.
Claim 2
Dependent Claim
228 words
In an oscilloscope, in combination: a cathode-ray tube provided with a screen and with an electron gun for training a beam upon said screen; a first sweep circuit for displacing said beam in an x direction at a relatively slow rate; a source of reference signal providing a standard of evaluation for said input signal; a second sweep circuit for oscillating said beam at a relatively fast rate in a y-direction orthogonal to said x-direction, said source of reference signal including rectifier means connected across said second sweep circuit for developing a supply voltage dependent upon the sweep in said y-direction ; brightness-control means for normally keeping said beam substantially suppressed; a source of input signal to be graphically represented on said screen; comparison means connected to said second sweep circuit and to said sources for briefly operating said brightness-control means to brighten said beam upon the deflection of the beam in said y-direction bearing a predetermined relationship to the output of either of said sources, thereby generating on said screen a visible trace of said input signal and a visible base line; and adjustable impedance means in the connection between said comparison means and said second sweep circuit for jointly varying the appearance of said trace and said base line in a correlated manner, said impedance means lying between said second sweep circuit and said rectifier means.
Claim 3
Dependent Claim
46 words
The combination defined in claim 1, further comprising reading means provided with switchover means for selectively connecting same to either of said sources and setting means in said source of reference signal for varying the magnitude of said reference signal as determined by said reading means.
Claim 4
Dependent Claim
208 words
In an oscilloscope, in combination: a cathode-ray tube provided with a screen and with an electron gun for training a beam upon said screen; a first sweep circuit for displacing said beam in an x-direction at a relatively slow rate; a second sweep circuit for oscillating said beam at a relatively fast rate in a y-direction orthogonal to said x-direction; a source of input signal to be graphically represented on said screen; at least one source of reference signal responsive to said second sweep circuit for providing a standard of evaluation for said input signal; at least two comparators with first inputs connected in parallel to said second sweep circuit and with second inputs respectively connected to said sources; brightness-control means connected to said comparators for keeping said beam normally suppressed but for briefly brightening same upon the deflection of the beam in said y-direction bearing a predetermined relationship with the output of either of said sources, thereby generating on said screen a visible trace of said input signal and at least one visible base line; and adjustable impedance means in the connection between said first inputs and said second sweep circuit for jointly varying the appearance of said trace and said base line in a correlated manner.
Claim 5
Dependent Claim
208 words
In an oscilloscope, in combination: a cathode-ray tube provided with a screen and with an electron gun for training a beam upon said screen; a first sweep circuit for displacing said beam in an x-direction at a relatively slow rate; a second sweep circuit for oscillating said beam at a relatively fast rate in a y-direction orthogonal to said x-direction; a source of input signal to be graphically represented on said screen; at least one source of reference signal responsive to said second sweep circuit for providing a standard of evaluation for said input signal; at least two comparators with first inputs connected in parallel to said second sweep circuit and with second inputs respectively connected to said sources; brightness-control means connected to said comparators for keeping said beam normally suppressed but for briefly brightening same upon the deflection of the beam in said y-direction bearing a predetermined relationship with the output of either of said sources, thereby generating on said screen a visible trace of said input signal and at least one visible base line; and adjustable impedance means in the connection between said first inputs and said second sweep circuit for jointly varying the appearance of said trace and said base line in a correlated manner.
Claim 6
Dependent Claim
33 words
The combination defined in claim 3 wherein said source of reference signal includes rectifier means connected across said second sweep circuit for developing a supply voltage dependent upon the sweep in said y-direction.
Claim 7
Dependent Claim
89 words
The combination defined in claim 3, including two sources of reference signal and three comparators for generating two visible base lines on said screen, further comprising readinG means for said input and reference signals, switch means for selectively connecting said reading means to any one of said second inputs to register the magnitude of the respective signal, and intensifying means for said brightness-control means coupled with said switch means for individually increasing the brightness of said trace and of said base lines in corresponding positions of said switch means.
Claim 8
Dependent Claim
46 words
The combination defined in claim 5 wherein said comparators include timing means for measuring an operating period for said brightness-control means, said intensifying means being actuatable by said switch means for selectively applying to any one of said comparators a control signal lengthening said operating period.
Claim 9
Dependent Claim
32 words
The combination defined in claim 6 wherein said timing means is connected to said second sweep circuit for interrupting the displacement of the beam in said y direction during said operating period.
Claim 10
Dependent Claim
98 words
The combination defined in claim 3, further comprising adjustable amplifier means inserted between said source of input signal and the second input of one of said comparators, complementarily adjustable attenuation means ganged with said adjustable amplifier means and connected to the second input of the other of said comparators, reading means for said input and reference signals, and switch means for connecting said reading means directly to the second input of said one of said comparators in a first position and to the second input of said other of said comparators through said attenuation means in another position.
Claim 11
Dependent Claim
27 words
The combination defined in claim 8 wherein said adjustable amplifier means and said adjustable attenuation means are provided with incremental step-down means and incremental step-up means, respectively.
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 |