The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2015
Filed:
Apr. 01, 2010
Kanako Hatayama, Tokyo, JP;
Kenji Maio, Tokyo, JP;
Kanako Hatayama, Tokyo, JP;
Kenji Maio, Tokyo, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
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 probeincludes cascaded source follower type NMOSFETsto, a variable current source, and a constant current source for biasing. The probecan be made to generate the output voltage Vo with arbitrary amplitude by controlling a gate voltage Vby controlling the output current value of the variable current source. In addition, a voltage applied to each NMOSFET can be divided by connecting the NMOSFETstoin a multi-stage manner. Accordingly, the withstand voltage of the NMOSFET may be low.