| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier and a semiconductor device that suppress power consumption in a power-down state.SOLUTION: An amplifier 10 includes: a PMOS transistor 12C configured to enter a block state to block a supply of driving voltage to a gate of a PMOS transistor 12A when an input inverted power-down signal indicates a normal operating state of a differential amplification circuit 12, and enter a supply state to supply a driving voltage to the gate of the PMOS transistor 12A when a power-down state of the differential amplification circuit 12 is indicated; and a PMOS transistor 12D configured to bring the gate and a drain of the PMOS transistor 12A to a conductive state when an input power-down signal indicates the normal operating state of the differential amplification circuit 12, and bring the gate and the drain of the PMOS transistor 12A to a nonconductive state when the power-down state of the differential amplification circuit 12 is indicated. |
