| 摘要 |
A bias voltage generating apparatus is placed outside an ultrasound observation apparatus and used together with the ultrasound observation apparatus, the ultrasound observation apparatus incorporating a transmission circuit generating a transmission signal and a reception circuit performing processing on a received signal, for transmitting/receiving ultrasound to/from a subject using a capacitive transducer. The bias voltage generating apparatus includes a power supply circuit for bias voltage which includes a chargeable secondary battery for producing a bias voltage to be applied to the capacitive transducer and produces the bias voltage, and a bias voltage superimposing portion which superimposes the bias voltage on the transmission signal to be outputted to outside the ultrasound observation apparatus and on the received signal to be inputted inside the ultrasound observation apparatus. |
