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 6,930,532
Date of Grant 2005/08/16
Inventor Kanou; Nobuo (Tokyo, JP), Yamaji; Takafumi (Yokohama, JP), Itakura; Tetsuro (Tokyo, JP)
Patent Title Exponential conversion circuit and variable gain circuit
Details In a master block, the exponential conversion characteristic is determined on the basis of a common mode reference voltage and a reference voltage. In a slave block, the exponential conversion characteristic determined with the master block is used to create a control voltage and a gain control signal on the basis of a common mode reference voltage and a reference voltage. For example, a gain of the variable gain amplifier is controlled by using this gain control signal.