Yamaji Takafumi
   Department   SOJO UNIVERSITY  Department of Computer and Information Sciences, FACULTY OF COMPUTER AND INFORMATIONSCIENCES
     /(DC)Division of Applied Information Sciences, Graduate School of Engineering
     /Division of Applied Information Sciences, Graduate School of Engineering
Country of acquisition Foreign country (米国)
Patent No. USP 7,482,959
Date of Grant 2009/01/27
Inventor Sai; Akihide (Kawasaki, JP), Ueno; Takeshi (Kawasaki, JP), Yamaji; Takafumi (Yokohama, JP)
Patent Title D/A converter and communication apparatus
Details A D/A converter includes a plurality of current sources configured to be on or off according to input digital data; a constant voltage source configured to apply a constant voltage to the current sources; current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source; ground-side wirings summing up output currents from the plurality of current sources; and output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.