CPC G01R 19/0092 (2013.01) [G01R 15/146 (2013.01)] | 16 Claims |
1. A current detection device comprising:
a shunt resistor connected in series to a path through which a current flows;
a first circuit that converts a voltage across the shunt resistor into a predetermined differential voltage;
a second circuit to which the predetermined differential voltage is input from the first circuit via a pair of wirings, the second circuit amplifying the predetermined differential voltage;
a constant current circuit connected between the pair of wirings; and
an arithmetic circuit that operates the current flowing through the path based on the voltage amplified by the second circuit,
wherein the constant current circuit adjusts an output voltage range of the second circuit.
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