PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus using a pulse wave generation circuit or a continuous wave generation circuit capable of reducing higher harmonics in the entire region of a frequency band to be used and the ultrasonic diagnostic apparatus capable of being miniaturized by enabling the pulse wave generation circuit to serve also as the continuous wave generation circuit, both circuit capable of reducing the higher harmonics to be used in common.SOLUTION: The pulse wave generation circuit or the continuous wave generation circuit includes: a first amplifier 2a by an operational amplifier 2a1 a second amplifier 2b operated by the DC power source ±HV of a positive polarity and a negative polarity to the center level of an output voltage for amplifying the output of the first amplifier 2a and an AC negative feedback means 2c by a resistor 2c2 for negative feedback for performing the AC negative feedback of the output voltage of the second amplifier 2b to the first amplifier 2a and a capacitor 2c3 for the negative feedback.COPYRIGHT: (C)2008,JPO&INPIT【課題】 使用する周波数帯の全域における高調波を低減できるパルス波発生回路又は連続波発生回路を用いた超音波診断装置及び高調波を低減できるパルス波発生回路と連続波発生回路を共用化して小型化が可能な超音波診断装置を提供する。【解決手段】 演算増幅器2a1による第1の増幅器2aと、この第1の増幅器2aの出力を増幅するための出力電圧の中心レベルに対して正の極性と負の極性の直流電源±HVで動作する第2の増幅器2bと、この第2の増幅器2bの出力電圧を前記第1の増幅器2aに交流負帰還する負帰還用抵抗2c2と負帰還用コンデンサ2c3とによる交流負帰還手段2cとを備えてパルス波発生回路又は連続波発生回路を構成する。【選択図】 図2
