US4510444A
Expired / Lapsed
US
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Digital measuring device with liquid-crystal picture screen
Assignee: Metrawatt GmbH
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Filing: 1982-06-04
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Granted: 1985-04-09
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Expires: 2002-06-04
Abstract
Abstract Digital measuring device, including a trigger generator having an input for receiving an analog measuring input signal, a variable delay line being connected to the trigger generator and having an output, an analog/digital converter receiving the analog measuring input signal, a transient memory connected to the analog/digital converter, a picture refresh memory connected to the transient memory for storing the measuring input signal, a Walsh function generator connected to the picture refresh memory, a liquid-crystal picture screen being connected to and addressed by the Walsh function generator, the output of the variable delay line being connected to the analog/digital converter, the transient memory and the picture refresh memory, and a selectable time base being connected to the variable delay line, the analog/digital converter and the transient memory.
Inventors
- 👤 Werner Haussel
- 👤 Gunter Roppelt
- 👤 Robert Kindermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:51
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Digital measuring device, comprising a trigger generator having an input for receiving an analog measuring input signal, a variable delay line being connected to said trigger generator and having an output, an analog/digital converter receiving the analog measuring input signal, a transient memory connected to said analog/digital converter, a picture refresh memory connected to said transient memory for storing the measuring input signal, a Walsh function generator connected to said picture refresh memory, a liquid-crystal picture screen being connected to and addressed by said Walsh function generator, the output of said variable delay line being connected to said analog/digital converter, said transient memory and said picture refresh memory, and a selectable time base being connected to said variable delay line, said analog/digital converter and said transient memory.
Claim 2
Dependent Claim
127 words
Digital measuring device, comprising a trigger generator having an input for receiving an analog measuring input signal, a variable delay line being connected to said trigger generator and having an output, an analog/digital converter receiving the analog measuring input signal, a transient memory connected to said analog/digital converter, a picture refresh memory connected to said transient memory for storing the measuring input signal, a Walsh function generator connected to said picture refresh memory, a liquid-crystal picture screen being connected to and addressed by said Walsh function generator, the output of said variable delay line being connected to said analog/digital converter, said transient memory and said picture refresh memory, and a selectable time base being connected to said variable delay line, said analog/digital converter and said transient memory.
Claim 3
Dependent Claim
40 words
Digital measuring device according to claim 1, wherein said liquid-crystal picture screen has a numerical display, and including a digital voltmeter connected to said numerical display for receiving the input signal and passing the input signal to said numerical display.
Claim 4
Dependent Claim
34 words
Digital measuring device according to claim 1, including a digital/analog converter connected to said picture refresh memory, a vector generator connected to said digital/analog converter, and a recorder output connected to said vector generator.
Claim 5
Dependent Claim
48 words
Digital measuring device according to claim 1, wherein said liquid-crystal picture screen has an X-axis with a given resolution, and said picture refresh memory has a memory depth being several times the required memory depth for increasing the given resolution of the X-axis of said liquid-crystal picture screen.
Claim 6
Dependent Claim
71 words
Digital measuring device according to claim 1, wherein said liquid-crystal picture screen has a Y-axis with a given resolution, and said analog/digital converter, said transient memory and said picture refresh memory have data buses each being constructed for increasing the given resolution of the Y-axis by a factor f of said liquid-crystal picture screen by increasing the digital magnitude of the digital signal applied to the Y-axis by said factor f.
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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |