Abstract:The phasedarray focused transducer has the advantages of adjustable focal length and transcranial focusing. The phase control and drive system of the phasedarray transducer is one of the key techniques that determine whether the phasedarray transducer can be used for clinical applications. At present, on the premise of meeting the requirements of the output parameters of the circuit system, reducing the system volume by increasing the system integration degree and improving the phase resolution are the key points and difficulties in the phase control and drive system design process of the phased array transducer. In this paper, based on the field programmable gate array (FPGA) main control chip, high speed digital to analog converter (DAC) and integrated drive amplifier, the phase control and driving system of phased array transducer for the high intensity focused ultrasound (HIFU) treatment is designed. The measured results show that the peaktopeak value of the output sine wave without highorder harmonics is 36.2 V, the phase resolution is 2 ns, delay error is less than 1 ns, which can satisfy the requirements of the element driving and phase resolution of the phased array transducer for HIFU treatment, and miniaturize the system.