Output circuit using analog amplifier

摘要

An output circuit includes an analog amplifier circuit including a differential amplifier stage configured to receive an input voltage, and first to n^th output systems (n is a natural number more than 1); first to n^th output nodes; an output pad; and first to n^th electrostatic protection resistances. An i^th output system (i is a natural number between 2 and n) of the first to n^th output systems includes an i^th PMOS transistor having a drain connected with the i^th output node of the first to n^th output nodes and a gate connected with a first output of the differential amplifier stage; and an i^th NMOS transistor having a drain connected with the i^th output node and a gate connected with a second output of the differential amplifier stage. The first to n^th electrostatic protection resistances are respectively connected between the first to n^th output nodes and the output pad.