DocumentCode :
2635652
Title :
A 3-5-GHz Low-Voltage High-Isolation Transformer-Based CMOS Mixer for UWB Applications
Author :
Lai, J.-T. ; Lin, Y.-S. ; Lu, C.-L. ; Chuang, H.-R.
Author_Institution :
Inst. of Comput. & Commun. Eng., Nat. Cheng Rung Univ., Tainan
fYear :
2008
fDate :
18-20 June 2008
Firstpage :
238
Lastpage :
238
Abstract :
This paper presents the implementation of a transformer-based 3-5-GHz UWB mixer in 0.18-mum CMOS process. An on-chip transformer being inserted between the transconductance and the switch stages, the proposed mixer satisfies the demands of low supply voltage and low power consumption in UWB applications. The RF transconductance stage of the mixer includes a capacitive cross-coupling to widen the working frequency to be 3 - 5 GHz. The measured results show that the mixer has a maximum conversion gain of 4.4 dB with a power consumption of 16 mW under a supply voltage of 0.8 V. The measured LO-IF, LO-RF and RF-IF isolations are 36 dB, 44 dB and 40 dB, respectively. The chip size is 1.78 times 1.39 mm2.
Keywords :
CMOS integrated circuits; microwave mixers; transformers; ultra wideband technology; CMOS mixer; UWB applications; capacitive cross-coupling; frequency 3 GHz to 5 GHz; low-voltage high-isolation transformer; maximum conversion gain; onchip transformer; voltage 0.8 V; CMOS process; Energy consumption; Gain measurement; Low voltage; Mixers; Power measurement; Radio frequency; Semiconductor device measurement; Switches; Transconductance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Innovative Computing Information and Control, 2008. ICICIC '08. 3rd International Conference on
Conference_Location :
Dalian, Liaoning
Print_ISBN :
978-0-7695-3161-8
Electronic_ISBN :
978-0-7695-3161-8
Type :
conf
DOI :
10.1109/ICICIC.2008.674
Filename :
4603427
Link To Document :
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