An ultrasonic probe includes: an ultrasonic transducer; an amplification stage; a bias circuit,
which determines a bias voltage on an input terminal of the amplification stage; and a
selector having an intermediate node, a high-voltage switch between the intermediate node
and the transducer, and a first low-voltage switch between the intermediate node and the
input terminal. A control unit controls the high-voltage switch and the first low-voltage switch
so as to alternately couple and decouple the amplification stage and the transducer. A …