Amplifier circuit

An amplifier circuit, comprising:

• a first transistor, through which a first input current is made to flow between the drain and the source;
• a second transistor, through which a second input current is made to flow between the drain and the source;
• a first-1 current source, which supplies a predetermined current to the gate of the first transistor;
• a first-2 current source, which supplies a predetermined current to the gate of the second transistor;
• a pair of adjustable resistors, which are connected in series between the gate of the first transistor and the gate of the second transistor;
• a connecting path, which connects a connection point of the pair of adjustable resistors to the drain of the first transistor;
• and
• a second current source, which supplies a current to the drain of the second transistor;
• wherein
• a current from the first-1 current source is supplied to the drain of the first transistor via one of the pair of adjustable resistors, and a current from the first-2 current source is supplied to the drain of the first transistor via the second adjustable resistor;
• and
• by relatively adjusting resistance values of the first adjustable resistor and the second adjustable resistor, offsets of gate voltages of the first transistor and the second transistor is capable of being adjusted.