INPUT/OUTPUT DEVICE, SEMICONDUCTOR DEVICE, ELECTRONIC APPARATUS AND SWITCHING CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To overcome the disadvantage that an inflow of unwanted current to an input terminal other than an input terminal used out of a plurality of input terminals causes an error in an output result.SOLUTION: When a multiple input operational amplifier 18 processes a first voltage, a signal level of a switching control signal PD_N0 is a low level while that of an inverted switching control signal PD_N1 is a high level. This brings an NMOS transistor MN5 to a nonconductive state and an NMOS transistor MN6 to a conductive state. When the multiple input operational amplifier 18 processes a second voltage, the signal level of the switching control signal PD_N0 is a high level while that of the inverted switching control signal PD_N1 is a low level. This brings the NMOS transistor MN5 to a conductive state and the NMOS transistor MN6 to a nonconductive state.