Operational amplification circuit

An operational amplification circuit comprising:

• a differential amplification circuit portion that amplifies a differential input;
• and
• an output circuit portion that outputs the amplified output using a signal amplified in the differential amplification circuit portion,
• wherein the differential amplification circuit portion comprises a pair of first transistors to which signals are differentially input, and second and third transistors which are connected to current paths of the pair of first transistors and which constitute a current mirror circuit with respect to each other,
• wherein the output circuit portion comprises a fourth transistor, a gate of which is connected to a drain of the second transistor, and an amplified output is output from a drain of the fourth transistor, and
• wherein a fifth transistor, a gate of which is connected to the drain of the second transistor, is provided between the second transistor and the ground, and a sixth transistor, a gate of which is connected to the drain of the third transistor, is provided between the third transistor and the ground.