AMPLIFYING CIRCUIT, ULTRASONIC PROBE, AND ULTRASONIC DIAGNOSTIC APPARATUS

摘要

The present invention reduces power consumption. An amplifying circuit (A11) changes an amplification factor corresponding to a control signal (spos). An amplifying circuit (A12) changes an amplification factor corresponding to a control signal (sneg). A signal detection circuit (DT1) outputs the control signal (spos) or the control signal (sneg) on the basis of the polarity of a difference between an output signal (s1) of the amplifying circuit (A11), and an output signal (s2) of the amplifying circuit (A12).