Title :
A new 0.25um CMOS on-chip active balun with gain controllability for 5GHz DCR [direct conversion receiver]
Author :
Rajashekharaiah, Mallesh ; Upadhyaya, Parag ; Heo, Deukhyoun ; Chen, Emery
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
Abstract :
An on-chip active balun with good gain and phase mismatch performance of within 0.5 dB and 1 degree, respectively, is presented in this paper. Applicable for direct conversion receiver circuits, the presented balun features reconfigurability in the form of controllable gain, designed to operate in the 5-6 GHz range with a bandwidth of 400 MHz. With good linearity, input/output matching and gain and with improvement in noise performance, the proposed active balun circuit could effectively be used as the first stage of an RF front end replacing the LNA.
Keywords :
CMOS analogue integrated circuits; baluns; gain control; radio receivers; 0.25 micron; 400 MHz; 5 to 6 GHz; CMOS; DCR; RF front end; balun linearity; direct conversion receiver; gain control; input/output matching; on-chip active balun; phase mismatch; reconfigurability; Bandwidth; Circuit noise; Circuit topology; Controllability; Impedance matching; Linearity; Narrowband; Performance gain; RF signals; Radio frequency;
Conference_Titel :
SoutheastCon, 2005. Proceedings. IEEE
Print_ISBN :
0-7803-8865-8
DOI :
10.1109/SECON.2005.1423219
