Title :
CMOS impedance transforming balun filter with improvement of magnetic coupling to nearby spiral inductors
Author :
Huang, Peng-Da ; Chang, Wei-Shin ; Chang, Chi-Yang ; Wang, Shih-Ming ; Chen, Cheng-Chung
Author_Institution :
Dept. of Commun. Eng., Nat. ChiaoTung Univ., Hsinchu, Taiwan
Abstract :
This paper presents a novel balun filter in TSMC 0.18μm CMOS technology which can suppress the magnetic coupling with nearby on-chip spiral inductors. The proposed balun filter keeps major requirements of a traditional coupled spiral inductor balun used in the output stage of a PA (power amplifier) such as center tap for DC bias, controllable impedance transformation ratio, good out-of-phase performance, etc. This new structure can achieve a maximum of 18 dB suppression of magnetic coupling to the nearby spiral inductor.
Keywords :
CMOS integrated circuits; baluns; inductors; CMOS impedance transforming balun filter; CMOS technology; DC bias; controllable impedance transformation ratio; coupled spiral inductor balun; magnetic coupling; on-chip spiral inductors; power amplifier; CMOS integrated circuits; Couplings; Impedance matching; Inductors; Magnetic separation; Microwave filters; Spirals;
Conference_Titel :
Microwave Conference (EuMC), 2011 41st European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-235-6
