Title :
A new down conversion active mixer with IMD2 and IMD3 cancellation in 0.18um CMOS technology
Author :
Mollaalipour, Marzieh ; Naimi, Hossein Miar
Author_Institution :
Babol Univ. of Technol., Babol, Iran
Abstract :
This paper presents a highly linear active mixer for UMTS applications. Three source-degenerated differential pairs are used in transconductance stage to reduce the second and third-order distortion components. Analysis of the proposed transconductance is presented to examine the effectiveness of the new technique. Simulations in a 0.18 um CMOS technology demonstrate that IIP3 and IIP2 of the proposed mixer have 6 dB and 16 dB improvements, respectively, compared with the conventional Gilbert-type mixer with the same power consumption. The mixer has a gain of 6 dB and drawing 4 mA from 1.8 V supply voltage.
Keywords :
3G mobile communication; CMOS integrated circuits; mixers (circuits); CMOS technology; IMD2 cancellation; IMD3 cancellation; UMTS application; conventional Gilbert-type mixer; current 4 mA; down conversion active mixer; gain 16 dB; gain 6 dB; highly linear active mixer; power consumption; second-order distortion component reduction; size 0.18 mum; source-degenerated differential pair; third-order distortion component reduction; transconductance stage; voltage 1.8 V; 3G mobile communication; CMOS integrated circuits; CMOS technology; Mixers; Resistance; Switching circuits; Topology; Gilbert-cell mixers; High linearity; Second and third-order input intercept point (IIP2, IIP3); Second and third-order inter-modulations (IM2, IM3);
Conference_Titel :
Electrical Engineering (ICEE), 2012 20th Iranian Conference on
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-1149-6
DOI :
10.1109/IranianCEE.2012.6292372
