Title :
A 1.5-V Current Mirror Double-Balanced Mixer With 10-dBm IIP3 and 9.5-dB Conversion Gain
Author :
Shi, Long Xing ; Chen, Chao ; Wu, Jian Hui ; Zhang, Meng
Author_Institution :
Nat. Applic.-Specified Integrated-Circuit Res. Center, Southeast Univ., Nanjing, China
fDate :
4/1/2012 12:00:00 AM
Abstract :
This brief presents the design of a double-balanced mixer for linearity-stringent communication systems. The pro- posed mixer is based on a current-mirror structure embedded with a switching pair. By utilizing the linear duplication characteristic of current mirrors, an improved linearity is achieved. The mixer is designed and fabricated in 0.18-μm 1P6M radio-frequency CMOS process, operating in the frequency band from 0.5 to 3 GHz. Measurement results indicate a peak conversion gain of 9.5 dB, a high input 3rd order intercept point (IIP3) of 10 dBm and a moderate noise figure (NF) of 16.5 dB. In addition, due to the folded structure, the mixer can be applicable in low-supply-voltage applications. The whole mixer has a compact die area of 0.1 mm2, and the power dissipation is 5.4 mW under 1.5-V supply voltage.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF mixers; current mirrors; embedded systems; integrated circuit design; microwave mixers; 1P6M radio-frequency CMOS process; 3rd order intercept point; IIP3; compact die area; conversion gain; current mirror double-balanced mixer; folded structure; frequency 0.5 GHz to 3 GHz; frequency band; gain 9.5 dB; linear duplication characteristics; linearity-stringent communication systems; low-supply-voltage applications; moderate noise figure; noise figure 16.5 dB; peak conversion gain; power dissipation; size 0.18 mum; switching pair; voltage 1.5 V; Gain; Linearity; Logic gates; Mirrors; Mixers; Radio frequency; Switches; CMOS; current mirror; folded structure; high linearity; mixer;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2012.2186365
