Title :
A down converter active mixer, in 0.25µm CMOS process for ultra wide-band applications
Author :
Iji Ayobami, B. ; Zhu, Forest ; Heimlich, Michael
Author_Institution :
Dept. of Electron. Eng., Macquarie Univ., Sydney, NSW, Australia
Abstract :
This paper presents improvement technique on linearity of a CMOS double balance Gilbert cell mixer with considerable high conversion gain at low power consumption. The mixer consists of inductive source degeneration in the transconductance stage providing impedance matching to improve linearity of the mixer. The mixer was designed to operate a Radio Frequency (RF) signal of 4GHz, a Local Oscillator frequency (LO) of 3.75GHz, thus providing an Intermediate Frequency (IF) of 0.25GHz. The circuit presents an Input third order Intercept point (IIP3) of +1dBm. A conversion gain of 10.45dB and a single sideband noise of 8dB over the band width. The DC power consumed by the core mixer is 4.5mW. The proposed active mixer design was made in 0.25μm CMOS Silanna process, suitable for wideband applications.
Keywords :
CMOS integrated circuits; impedance matching; low-power electronics; mixers (circuits); ultra wideband technology; CMOS Silanna process; CMOS double balance Gilbert cell mixer; RF signal; frequency 0.25 GHz; frequency 3.75 GHz; frequency 4 GHz; gain 10.45 dB; impedance matching; intermediate frequency; local oscillator frequency; low power consumption; noise figure 8 dB; power 4.5 mW; radiofrequency signal; size 0.25 mum; ultra wide-band applications; CMOS integrated circuits; Linearity; Mixers; Noise; Radio frequency; Transconductance; Transistors; Gilbert Cell; Low Power; Mixer; Multiplier; Ultra Wideband Mixer;
Conference_Titel :
Communications and Information Technologies (ISCIT), 2012 International Symposium on
Conference_Location :
Gold Coast, QLD
Print_ISBN :
978-1-4673-1156-4
Electronic_ISBN :
978-1-4673-1155-7
DOI :
10.1109/ISCIT.2012.6380908
