Sensor with a programmable switching threshold
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United States of America Patent
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Aug 4, 1998
Grant Date -
N/A
app pub date -
Jun 29, 1995
filing date -
Jun 30, 1994
priority date (Note) -
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Abstract
A programmable switching threshold sensor including a sensing element having its measurement output terminals connected to a comparator, a current-signal generator, for generating a reference current signal changing in steps. An encoding unit has a code assignable corresponding to the values of the reference current signal. A memory unit is connected to the encoding unit for transferring and storing the code. The reference current signal is coupled to the comparator for comparison with measurement output signals from the sensing element. The output of the comparator is coupled to the memory unit for applying an enable signal permitting the transfer of the code, and a control unit for controlling the signal generator and the encoding unit. The reference signal is a current signal or a voltage signal, depending on the corresponding sensing element and the evaluating circuit used.
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