Provided is a mixer including: an amplifier amplifying an input signal
using at least one amplifier element; a mixing unit mixing the input
signal amplified by the amplifier with a local oscillator signal output
from a local oscillator. The mixing unit includes at least one pair of
switching elements switching the amplifier, and the switching elements
are MOSFETs having gates and body nodes to which a same local oscillator
signal is applied. Thus, a time required for turning on the switching
elements can be reduced, and 1/f noise is also reduced. Also, an
overdrive voltage can be increased with respect to local oscillator
signals having an identical intensity. Thus, a relatively low voltage
operation can be performed.