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AssigneeHitachi Medical Corporation
InventorsKanako Hatayama, Kenji Maio
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In order to simplify a manufacturing process and reduce cost and power consumption by providing an ultrasonic diagnostic apparatus including a carrier signal generating circuit excellent in IC implementation, a carrier signal generating circuit for generating an output voltage Vo applied to an ultrasonic probe 41 includes cascaded source follower type NMOSFETs 11 to 14, a variable current source 31, and a constant current source for biasing 32. The probe 41 can be made to generate the output voltage Vo with arbitrary amplitude by controlling a gate voltage V4 by controlling the output current value of the variable current source 31. In addition, a voltage applied to each NMOSFET can be divided by connecting the NMOSFETs 11 to 14 in a multi-stage manner. Accordingly, the withstand voltage of the NMOSFET may be low.
An ultrasonic diagnostic apparatus comprising:
A carrier signal generating circuit that generates an ultrasonic signal applied to a probe of an ultrasonic diagnostic apparatus which transmits and receives an ultrasonic wave to and from an object and forms an ultrasonic image on the basis of received ultrasonic image data,
A carrier signal generating circuit that generates an ultrasonic signal applied to a probe of an ultrasonic diagnostic apparatus which transmits and receives an ultrasonic wave to and from an object and forms an ultrasonic image on the basis of received ultrasonic image data,
Dependencies are inferred from the claim text.