SHUNT RESISTANCE MEASUREMENT CIRCUIT FOR SHUNT-BASED CURRENT SENSOR
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 5, 2024
filing date -
Sep 5, 2024
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Abstract
A shunt resistance measurement circuit is adapted to a shunt-based current sensor configured to measure a resistance value of a shunt resistor. The shunt resistance measurement circuit includes a control circuit, a switching power supply circuit, a voltage measurement circuit, and a signal processing circuit. The control circuit outputs a control signal including an AC carrier signal. The switching power supply circuit is operated by the control signal to output a power supply to the shunt resistor. The voltage measurement circuit measures a voltage across the shunt resistor. The signal processing circuit measures the resistance value of the shunt resistor by executing signal processing, based on the voltage measured by the voltage measurement circuit.
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