Measuring circuit for monitoring and testing functionality of a measuring chain
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United States of America Patent
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Nov 22, 2016
Grant Date -
Aug 14, 2014
app pub date -
Jan 10, 2014
filing date -
Feb 14, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A measuring circuit which includes an evaluation circuit (13, 63); a sensing circuit (39, 40) having a sensing element (6, 55) configured to generate a measuring signal from a measuring object (7) and a transmission line (26, 69) for transmitting the measuring signal to the evaluation circuit (13, 63); and a test signal injection circuit (21) including a signal injector (12) and an injection line (20) connecting a signal output of the signal injector (12) with the sensing circuit (39, 40) for feeding a test signal into the sensing circuit (39, 40) such that the test signal is transmittable to the evaluation circuit (13, 63) over the transmission line (26, 69). The injection line (20) and the transmission line (26, 69) are advantageously interconnected in series via the sensing element (6, 55) such that the test signal can be fed through the sensing element (6, 55).
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