Method for measuring a physical parameter and electronic circuit for implementing the same
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United States of America Patent
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Apr 24, 2018
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May 26, 2015
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Jul 7, 2014
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Abstract
The physical parameter measurement method is performed using an electronic circuit (1) with a resistive sensor (2). The resistive sensor includes two resistors (R1, R2) mounted in series, whose connection node connected to a moving mass (M), is connected to a first input of an amplifier-comparator (3). A second input of the amplifier-comparator receives a reference voltage. One output of the amplifier-comparator is connected to a logic unit (4), which provides a digital output signal (OUT). A digital-to-analogue converter (5) provides a measurement voltage (Vdac), as a function of a digital signal provided by the logic unit, to the first resistor (R1) in a first phase of a measurement cycle, whereas the second resistor (R2) is polarized by a polarization voltage, and to the second resistor in a second phase, whereas the first resistor is polarized by a polarization voltage via a switching unit.
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