TRANSMISSION INPUT CIRCUIT

摘要

A transmission input circuit is provided with an adjustment processing unit that is switched on during idle time when there is no current transmitted from an auxiliary unit, supplies a reference current to a current sensing resistor from a constant-current circuit, generates for the current sensing resistor a target adjusted voltage wherein a threshold voltage corresponding to the reference current is added to a load current sensed voltage corresponding to a load current, and additionally adjusts a digital value so that a reference voltage output from a digital variable resistor will agree with the target adjusted voltage.