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 7,414,468
Date of Grant	2008/08/19
Inventor	Yamaji; Takafumi (Yokohama, JP), Ito; Rui (Chigasaki, JP), Itakura; Tetsuro (Tokyo, JP)
Patent Title	Amplifier, filter using the same, and radio communication device
Details	An amplifier includes an amplification unit which amplify a first difference between first and second input signals, a second difference between second and third input signals and a third difference between third and first input signals by a differential mode gain, and amplify an average of the first, second and third input signal by a common mode gain, for outputting a first output signal corresponding to a sum of the amplified first difference and the amplified average, a second output signal corresponding to a sum of the amplified second difference and the amplified average, and a third output signal corresponding to a sum of the amplified third difference and amplified average; first, second; and a reduction circuit which reduces the common mode gain less than the differential mode gain.