Patent US3938003A successfully refreshed from Google Patents.
US3938003A
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US
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Dual trace display device
Assignee: Leader Electronics Corp
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Filing: 1973-06-27
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Granted: 1976-02-10
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Expires: 1993-06-27
Abstract
Abstract A dual trace display device having a gate circuit for receiving input signals, a sweep signal generator, a rectangular waveform generator supplied with the output signal from the sweep signal generator, and a driving circuit supplied with the output signal from the rectangular waveform generator and controlling the gate circuit. In this case, a display device is supplied with the output signals from the gate circuit and the sweep signal generator for displaying the same thereon.
Inventors
- 👤 Kazuyoshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:41
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
A dual trace display device comprising: a. two input terminals supplied with two signals to be displayed, respectively, b. a gate circuit connected to receive said two input signals, c. a sweep signal generator producing a signal in synchronism with one of said two input signals, d. a rectangular waveform generator connected to receive the output from said sweep signal generator and producing an output signal, e. a driving circuit connected to receive the output from said rectangular waveform generator, producing a pair of signals with opposite polarities and applying said signals to said gate circuit to alternatively pass said two input signals through said gate circuit, and f. a display device connected to receive the outputs from said gate circuit and said sweep signal generator and display thereon said input signals with the same reference axis and simultaneously in a time sequential manner.
Claim 2
Dependent Claim
144 words
A dual trace display device comprising: a. two input terminals supplied with two signals to be displayed, respectively, b. a gate circuit connected to receive said two input signals, c. a sweep signal generator producing a signal in synchronism with one of said two input signals, d. a rectangular waveform generator connected to receive the output from said sweep signal generator and producing an output signal, e. a driving circuit connected to receive the output from said rectangular waveform generator, producing a pair of signals with opposite polarities and applying said signals to said gate circuit to alternatively pass said two input signals through said gate circuit, and f. a display device connected to receive the outputs from said gate circuit and said sweep signal generator and display thereon said input signals with the same reference axis and simultaneously in a time sequential manner.
Claim 3
Dependent Claim
32 words
A dual trace display device according to claim 1, in which said gate circuit consists of two field effect transistors with their gate electrodes controlled by the output from said driving circuit.
Claim 4
Dependent Claim
35 words
A dual trace display device according to claim 2, in which a pair of diodes are respectively connected between the gate electrodes of said field effect transistors and the output side of said driving circuit.
Claim 5
Dependent Claim
50 words
A dual trace display device according to claim 1, in which said driving circuit further includes a means for changing the DC level of the output signal from said sweep signal generator, whereby only one of said two input signals is passed through said gate circuit to said display device.
Claim 6
Dependent Claim
17 words
A dual trace display device according to claim 4, in which said means is a variable resistor.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |