PROBLEM TO BE SOLVED: To improve power supply conversion efficiency of a switching power supply at a low cost.SOLUTION: Ultrasonic diagnostic equipment includes an ultrasonic probe, a processing device and a direct current power supply part. The processing device includes a transmission/reception part controlling transmission/reception of ultrasonic waves by the ultrasonic probe, generates image data from received signals received by the transmission/reception part and displays the data. The direct current power supply part supplies direct current to the processing device. The direct current power supply part includes: a converter converting alternate current into direct current a driving pulse control part controlling a pulse width of a driving pulse which is supplied to the converter an arithmetic processing part arranged on the same reference potential as that of the driving pulse control part and supplying control signals to the driving pulse control part and a separation part arranged between the driving pulse control part and the converter as an object to be controlled by the driving pulse control part and electrically separating frequency of the driving pulse from a harmonic band of the driving pulse.COPYRIGHT: (C)2016,JPO&INPIT【課題】スイッチング電源の電源変換効率を安価に向上させること。【解決手段】実施形態の超音波診断装置は、超音波プローブと、処理装置と、直流電源部とを備える。処理装置は、超音波プローブによる超音波の送受信を制御する送受信部を含み、送受信部によって受信された受信信号から、画像データを生成して表示する。直流電源部は、処理装置に直流を供給する。また、この直流電源部は、交流を直流に変換するコンバータと、コンバータに供給する駆動パルスのパルス幅を制御する駆動パルス制御部と、駆動パルス制御部と同一の基準電位上に配置され、駆動パルス制御部に制御信号を供給する演算処理部と、駆動パルス制御部と、当該駆動パルス制御部が制御対象とするコンバータとの間に設けられ、駆動パルスの周波数と、当該駆動パルスの高調波帯域とを電気的に分離する分離部と、を備える。【選択図】図2
