Ultrasonic diagnostic apparatus

An ultrasonic diagnostic apparatus, comprising an ultrasonic probe which transmits and receives ultrasonic waves to and from a subject to be examined, a transmitting unit for supplying driving signals for the ultrasonic probe, a receiving unit for processing received signals, which come from the subject and are outputted from the ultrasonic probe, and a display unit for displaying diagnostic information configured based on the received signals to be outputted from the receiving means regarding the subject,

• wherein the ultrasonic probe consists of multiple transducers for transmitting and multiple transducers for receiving provided separately,
• the apparatus further comprises:
• a continuous wave transmitting unit for generating a continuous wave,
• a phase rotation unit for transmitting that rotates a phase of a continuous wave received from the continuous wave transmitting unit by a predetermined amount for each transducer for transmitting and supplies the phase-rotated wave to the transducer for transmitting as a driving signal,
• a direct current (DC) bias supply unit for supplying a DC bias having a predetermined level to the transducer for transmitting,
• a phase rotation unit for receiving that rotates a phase of a continuous wave received from the continuous wave transmitting unit by a predetermined amount for each transducer for receiving, and
• a modulated bias amplifying unit provided between the phase rotation unit for receiving and the transducers for receiving,
• wherein the modulated bias amplifying unit amplifies an amplitude of the continuous wave signal subjected to the phase rotation to supply a modulated-bias signal having a frequency identical with a frequency of the driving signal to the transducers for receiving.