| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a phasing adder and an ultrasonic probe which can efficiently and appropriately acquire a signal while suppressing power consumption and maintaining an SNR from a received ultrasonic wave.SOLUTION: A phasing adder comprises: a delay charge transfer unit which includes a transferring and holding part for acquiring a signal charge of an amount obtained without amplification in accordance with an electric charge generated in each of a plurality of piezoelectric elements respectively having a piezoelectric substance generating an electric charge according to sound pressure of an input ultrasonic wave, and performing delivery while holding the signal charge by a prescribed time period over a plurality of preset stages; and a delay addition unit which performs phasing addition of the signal charge held over the plurality of preset stages in the delay charge transfer part. The electric capacity of an initial stage holding part for acquiring and holding the signal charge at the first stage of the plurality of stages in the transferring and holding part and at the reception of the ultrasonic wave is larger than each electric capacity of subsequent stage holding parts for holding the signal charge at the second or subsequent stage in the transferring and holding part.</p> |
