Patent ID: 7289390

Claim:
An ultrasonic apparatus comprising: a transducer having a plurality of transducer elements; a controller operatively connected to said transducer and driving the transducer elements to produce a first ultrasonic transmitting beam having a first frequency and a second ultrasonic transmitting beam having a second frequency; and a processor operatively connected to said transducer for forming and moving reception beams to receive echo signals and extracting frequency components corresponding to said first ultrasonic transmitting beam and said second ultrasonic transmitting beam; wherein the controller includes a pulse-duration modulation signal generator for providing a driving signal waveform to the transducer element, and a converter for converting the pulse-duration modulation signal into an analog signal and amplifying the signal; and the processor includes an amplifier for amplifying a received signal received by the transducer element and converting the amplified received signal into digital signal, a processor performing a phase control calculation to determine the direction of the received signal, and a filter for extracting components of the transmitting frequency.