US3795834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscilloscope having external trigger display mode
Assignee: Tektronix Inc
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Filing: 1972-07-05
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Granted: 1974-03-05
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Expires: 1992-07-05
Abstract
Abstract An oscilloscope has an additional vertical display mode to enable the display of an external triggering signal while it is activating the sweep-generating circuit. Triggering source, level, slope, and timing can be verified or examined without reconnection of signal cables or disturbing front-panel controls. When switching between vertical display modes, the displayed external triggering signal is in precise time relationship with signals displayed through normal vertical channels.
Inventors
- 👤 R Andrews
- 👤 R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:49
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
186 words
In an oscillographic instrument for providing a display of electrical signals; said instrument including vertical deflection means for generating a first vertical deflection signal in accordance with the instantaneous amplitude of a first electrical input signal for determining the amplitude of a waveform thereof; said instrument also including horizontal deflection means for generating a horizontal deflection signal for providing a timebase sweep signal, said sweep signal being generated in response to the output of a trigger comparator means whose inputs are a selective second electrical input signal and a selective reference voltage, wherein said second electrical signal is compared to said selective reference voltage; the improvement comprising: means for receiving said second electrical and said selective reference voltage from said trigger comparator means and generating a second vertical deflection signal in response thereto, said second vertical deflection signal being generated in accordance with the amplitude of said second electrical signal and in comparison to said reference voltage for determining the sweep-initiating point on the displayed waveform thereof; and means for selectively providing a display of said first vertical deflection signal or said second vertical deflection signal.
Claim 2
Dependent Claim
186 words
In an oscillographic instrument for providing a display of electrical signals; said instrument including vertical deflection means for generating a first vertical deflection signal in accordance with the instantaneous amplitude of a first electrical input signal for determining the amplitude of a waveform thereof; said instrument also including horizontal deflection means for generating a horizontal deflection signal for providing a timebase sweep signal, said sweep signal being generated in response to the output of a trigger comparator means whose inputs are a selective second electrical input signal and a selective reference voltage, wherein said second electrical signal is compared to said selective reference voltage; the improvement comprising: means for receiving said second electrical and said selective reference voltage from said trigger comparator means and generating a second vertical deflection signal in response thereto, said second vertical deflection signal being generated in accordance with the amplitude of said second electrical signal and in comparison to said reference voltage for determining the sweep-initiating point on the displayed waveform thereof; and means for selectively providing a display of said first vertical deflection signal or said second vertical deflection signal.
Claim 3
Dependent Claim
173 words
An oscillographic instrument for providing a display of electrical signals, said instrument comprising: first vertical amplifier means for generating a first vertical deflection signal in accordance with the amplitude of a first electrical input signal for determining the amplitude of the waveform thereof; horizontal deflection means generating a horizontal deflection signal for providing a time-base sweep signal, said horizontal deflection means including a trigger generator portion thereof for producing a trigger signal to initiate said time-base sweep signal, said trigger generator comparing the substantially varying voltage of said second electrical signal to a selective reference voltage therein and said trigger signal being produced when the instantaneous voltage of said second electrical signal is equal to said reference voltage; second vertical amplifier means for receiving said second electrical signal and said selective reference voltage from said trigger generator and generating a second vertical deflection in response thereto; and vertical deflection means including switching means for selectively providing a display of either or both of said first vertical deflection and said second vertical deflection signal.
Claim 4
Dependent Claim
173 words
An oscillographic instrument for providing a display of electrical signals, said instrument comprising: first vertical amplifier means for generating a first vertical deflection signal in accordance with the amplitude of a first electrical input signal for determining the amplitude of the waveform thereof; horizontal deflection means generating a horizontal deflection signal for providing a time-base sweep signal, said horizontal deflection means including a trigger generator portion thereof for producing a trigger signal to initiate said time-base sweep signal, said trigger generator comparing the substantially varying voltage of said second electrical signal to a selective reference voltage therein and said trigger signal being produced when the instantaneous voltage of said second electrical signal is equal to said reference voltage; second vertical amplifier means for receiving said second electrical signal and said selective reference voltage from said trigger generator and generating a second vertical deflection in response thereto; and vertical deflection means including switching means for selectively providing a display of either or both of said first vertical deflection and said second vertical deflection signal.
Claim 5
Dependent Claim
50 words
The oscillographic instrument according to claim 2 wherein said second vertical amplifier means comprises a balanced differential amplifier receiving respectively at a pair of input terminals therein said second electrical signal and said reference voltage thereby producing said second vertical deflection signal differentially at a pair of output terminals therein.
Claim 6
Dependent Claim
31 words
The oscillographic instrument according to claim 3 wherein said second vertical amplifier means also includes delay means for providing substantially matched time delay between said first and second vertical amplifier means.
Claim 7
Independent Claim
156 words
The method of displaying an auxiliary electrical signal by an oscillographic instrument including a first vertical deflection means generating a first vertical deflection signal in accordance with the instantaneous amplitude of a primary electrical input signal and including horizontal deflection means generating a horizontal deflection signal in response to the comparison of said auxiliary electrical signal to a selective reference voltage in a trigger generator portion thereof, said method comprising: applying said auxiliary electrical signal to a first input terminal of a second vertical deflection means while applying said reference voltage to a second input terminal of said second verTical deflection means, generating a second vertical deflection signal in accordance with the instantaneous amplitude of said auxiliary signal and the level of said reference voltage, delaying said second vertical deflection signal to provide a time match with said first vertical deflection signal, and selectively displaying said first vertical deflection signal and/or said second vertical deflection signal.
Claim 8
Independent Claim
156 words
The method of displaying an auxiliary electrical signal by an oscillographic instrument including a first vertical deflection means generating a first vertical deflection signal in accordance with the instantaneous amplitude of a primary electrical input signal and including horizontal deflection means generating a horizontal deflection signal in response to the comparison of said auxiliary electrical signal to a selective reference voltage in a trigger generator portion thereof, said method comprising: applying said auxiliary electrical signal to a first input terminal of a second vertical deflection means while applying said reference voltage to a second input terminal of said second verTical deflection means, generating a second vertical deflection signal in accordance with the instantaneous amplitude of said auxiliary signal and the level of said reference voltage, delaying said second vertical deflection signal to provide a time match with said first vertical deflection signal, and selectively displaying said first vertical deflection signal and/or said second vertical deflection signal.
Claim 9
Dependent Claim
15 words
The method according to claim 5 wherein said auxiliary signal is an external triggering signal.
Claim 10
Dependent Claim
71 words
An oscilloscope having means to provide a display of an external triggering signal while said signal is activating a sweep generator portion thereof, said means comprising: trigger-view amplifier means receiving an input from a trigger generator portion of said oscilloscope, said input including said external triggering signal and a triggering level reference voltage, and switching means selecting a display signal from normal vertical amplifier channel means and/or said trigger-view amplifier means.
Claim 11
Dependent Claim
71 words
An oscilloscope having means to provide a display of an external triggering signal while said signal is activating a sweep generator portion thereof, said means comprising: trigger-view amplifier means receiving an input from a trigger generator portion of said oscilloscope, said input including said external triggering signal and a triggering level reference voltage, and switching means selecting a display signal from normal vertical amplifier channel means and/or said trigger-view amplifier means.
Claim 12
Dependent Claim
41 words
The oscilloscope according to claim 7 wherein said trigger-view amplifier means is a balanced differential amplifier including delaying means to provide a time match between signals processed by said trigger-view amplifier means and a normal vertical amplifier means of said oscilloscope.
Claim 13
Dependent Claim
32 words
The oscilloscope according to claim 7 wherein said display of said external triggering signal includes triggering level and triggering slope information such that the sweep-initiating point is determinable from the waveform thereof.
References Cited (Backward Citations)
US3559082A
Cited
US3599034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |