Patent ID: 9335350
Filing Date: 2016-05-10
CPC Classification: G01R

Claim Text:
1. An electronic device comprising: a power supply circuit configured to supply a main current; a receiver circuit configured to be driven by the main current supplied from the power supply circuit; a detection circuit configured to detect a voltage difference occurring between both ends of a wiring portion which is at least a portion of a power supply wiring that connects the power supply circuit and the receiver circuit, by a current flowing in the power supply wiring; a current supply circuit configured to supply a pilot current having a first current value which is smaller than a second current value of the main current to the power supply wiring; and a control circuit configured to control supply of the pilot current and stop of the supply of the pilot current for the current supply circuit, to calculate a wiring resistance value of the wiring portion based on a first value of the voltage difference detected by the detection circuit when the supply of the pilot current is stopped, a second value of the voltage difference detected by the detection circuit when the pilot current is supplied, and the first current value and to calculate the second current value based on the first value of the voltage difference and the wiring resistance value.