Semiconductor apparatus for reading stored information of a resistor or cell

A semiconductor apparatus includes a variable resistor, a variable resistor selection unit configured to electrically couple the variable resistor to a sense amplifier in response to a resistor selection signal, a power supply unit configured to apply a first voltage to the variable resistor selection unit in response to a read signal, and a switch driving unit configured to generate the resistor selection signal in response to a resistor selection control signal, and to raise a voltage of the resistor selection signal when the first voltage is applied to the variable resistor selection unit.