In the semiconductor circuit element and the aforementioned semiconductor circuit element which possess the function where the ultrasonic transmitter-receiver circuit of this invention has 3 terminals of the third terminal which is made the amplifier output edge of the reception signal from the 2nd terminal and the aforementioned oscillator element which are connected to the 1st terminal and the transmission signal occurrence circuit in the plural oscillator elements which form the ultrasonic probe at least, expands the signal which the said at least is input into the terminal of one side between 2 terminals among 3 terminals with the other terminal and outputs as an input switch of the transmission signal to the aforementioned oscillator element functioning 1st function and the aforementioned oscillator which it can pointIn order for the 2nd function which expands the reception signal which is received from the element functioning to do respectively, with the control section which is controlled it has.本発明の超音波送受信回路は、超音波探触子を構成する複数の振動子素子に第1端子と、送信信号発生回路に接続する第2端子と、前記振動子素子からの受信信号の増幅器出力端とする第三端子の3端子を少なくとも有し、該少なくとも3端子のうちの2端子間には一方の端子に入力された信号を他方の端子で増幅して出力する機能を有する半導体回路素子と、前記半導体回路素子に前記振動子素子への送信信号の入力スイッチとして機能させる第1の機能と前記振動子素子から受信する受信信号を増幅する第2の機能とがそれぞれ機能するように制御する制御部とを備える。
