Variable color digital voltmeter with analog comparator
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United States of America Patent
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Nov 14, 2000
Issued Date -
N/A
app pub date -
Jun 18, 1999
filing date -
Jul 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A digital measuring device of the invention simultaneously exhibits the measured value of an analog signal, by digital indication, and its relation to an analog limit, by color of the digital indication. The measuring device includes an analog comparator, for comparing the value of the analog signal with the analog limit and for developing a comparison accordingly, and a digital measuring device, for converting the measured value of the analog signal to digital data, which are digitally exhibited on a variable color light emitting diode digital display device. The comparison signal is applied to a color control input of the display device, for controlling the color of the digital indication in accordance with the relation of the value of the analog signal to the analog limit.
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