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
   Position  
Country of acquisition Foreign country (米国)
Patent No. USP 6,381,449
Date of Grant 2002/04/30
Inventor Yamaji; Takafumi (Kanagawa-ken, JP), Itakura; Tetsuro (Tokyo, JP), Tanimoto; Hiroshi (Kanagawa-ken, JP)
Patent Title Frequency converter
Details A frequency converter including a mixer circuit which inputs a local oscillation signal and a radio-frequency input signal modulated for communication of information, and performs frequency conversion. A buffer amplifier is higher than a desired signal frequency band, and has a low-pass passage characteristic of cut-off frequency lower than an adjacent channel carrier frequency.