Current trimming circuit and a/d converter including current trimming circuit

A current trimming circuit for inputting a trimmed current to an internal circuit driven by the input current, comprising:

• a voltage-to-current conversion circuit configured to convert an input voltage into a current;
• a current mirror circuit including a plurality of transistors connected together in parallel and configured to receive the current obtained by the conversion and output a mirrored version of the received current;
• an external terminal connectable to an external monitor for measuring a current value;
• a switch configured to input the output current of the current mirror circuit to the external terminal or the internal circuit;
• and
• a control circuit configured to switch connections of gates of the transistors included in the current mirror circuit to trim the output current of the current mirror circuit, wherein
• based on a result of measurement obtained when the external terminal is connected to the external monitor, the current trimmed by the control circuit is input via the switch to the internal circuit.