Title :
An active balun for high-CMRR IC design
Author :
Centurelli, Francesco ; Luzzi, Raimondo ; Marietti, Piero ; Scotti, Giuseppe ; Tommasino, Pasquale ; Trifiletti, Alessandro
Author_Institution :
Dept. of Electron. Eng., Univ. of Rome "La Sapienza", Italy
Abstract :
A circuit topology that provides large bandwidth single-ended to differential conversion is presented. The proposed cell is based on a differential pair where feedback on common mode signal provides about 6 dB conversion gain increase, together with attenuation of common mode signal. Small-signal characterisation is presented, based on a block decomposition of the cell. Measurements on a SiGe test IC show more than 5 dB of gain improvement with respect to a simple differential pair.
Keywords :
Ge-Si alloys; analogue integrated circuits; baluns; circuit feedback; differential amplifiers; 6 dB; SiGe; active balun; block decomposition; circuit topology; common mode signal; differential conversion; differential pair; gain improvement; high-CMRR IC design; small-signal characterisation; Attenuation; Circuit topology; Differential amplifiers; Gain; Impedance matching; Optical attenuators; Optical feedback; Optical filters; Optical receivers; Optical signal processing;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610252
