Keyword : direct-conversion

A Low LO Leakage and Low Power LO Buffer for Direct-Conversion Quadrature Demodulator
Toshiya MITOMO Osamu WATANABE Shoji OTAKA Ryuichi FUJIMOTO Shunji KAWAGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/06/01
Vol. E88-C  No. 6 ; pp. 1212-1217
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: RF
Keyword: 
LO buffer, quadrature demodulator, direct-conversion, self mixing, DC offset, 
 Summary | Full Text:PDF
Gate Current Control Method by Pull-Down FET's for 0-28 dB GaAs Variable Attenuator in Direct-Conversion Modulator IC for 1.9 GHz PHS
Tadahiro SASAKI Shoji OTAKA Tadahiko MAEDA Toshiyuki UMEDA Kazuya NISHIHORI Atsushi KAMEYAMA Mayumi HIROSE Yoshiaki KITAURA Naotaka UCHITOMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/06/25
Vol. E80-C  No. 6 ; pp. 794-799
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeterwave High-power Devices)
Category: 
Keyword: 
GaAs, direct-conversion, attenuator, modulator, MMIC, MESFET, personal handy phone system, 
 Summary | Full Text:PDF