| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power circuit for an ultrasound image display device for achieving accurate symmetry between a positive voltage and a negative voltage. <P>SOLUTION: The power circuit for an ultrasound image display device includes: a transformer 3 having a secondary winding comprising a first secondary winding 7 and a second secondary winding 8 connected in series; a positive side output line 9 which is connected to an end on the side opposite to the second secondary winding 8 in the first secondary winding 7 and outputs a positive voltage +HV used for energy to transmit ultrasound; a negative side output line 10 which is connected to an end on the side opposite to the first secondary winding 7 in the second secondary winding 8 and outputs a negative voltage -HV used for energy to transmit ultrasound; and a feedback circuit 5 for feeding back a voltage expressed by ¾+HV¾=¾-HV¾ between the first secondary winding 7 and the second secondary winding 8 based on the voltage difference between the positive voltage +HV and the negative voltage -HV. <P>COPYRIGHT: (C)2012,JPO&INPIT |
