Patent ID: 8465430

Claim:
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.