Operational amplifier

An operational amplifier comprising:

• a non-inverting input terminal that receives a first input voltage;
• an inverting input terminal that receives a second input voltage;
• a P-type metal oxide semiconductor input differential pair connected to the non-inverting input terminal and the inverting input terminal;
• a first input tail current source connected to sources of the P-type metal oxide semiconductor input differential pair;
• an N-type metal oxide semiconductor input differential pair connected to the non-inverting input terminal and the inverting input terminal;
• a second input tail current source connected to sources of the N-type metal oxide semiconductor input differential pair;
• an output stage that receives an output of the P-type metal oxide semiconductor input differential pair and an output of the N-type metal oxide semiconductor input differential pair;
• a first correction circuit that corrects an offset voltage of the P-type metal oxide semiconductor input differential pair;
• and
• a second correction circuit that corrects an offset voltage of the N-type metal oxide semiconductor input differential pair,
• wherein the first correction circuit and the second correction circuit operate over an operation region of the P-type metal oxide semiconductor input differential pair, an operation region of the N-type metal oxide semiconductor input differential pair, and a transition region in which both the P-type metal oxide semiconductor input differential pair and the N-type metal oxide semiconductor input differential pair operate.