Arithmetic amplifier and pipeline type ad converter

A differential voltage wiring (W101a) electrically connects the gate electrode of a transistor to be used out of differential transistors (T101a, T101a, ) with an input node receiving an input voltage (Vinn), and a differential voltage wiring (W101b) electrically connects the gate electrode of a transistor to be used out of differential transistors (T101b, T101b, ) with an input node receiving aninput voltage (Vinp). A bias voltage wiring (W102) electrically connects the gate electrode of a transistor to be used out of current source transistors (T102, T102, ) with a bias node receiving a bias voltage (VBN) and a bias voltage wiring (W103) electrically connects the gate electrode of a transistor to be used out of load transistors (T103a, T103a,, T103b, T103b, ) with a bias node receivinga bias voltage (VBP).