DocumentCode :
2251786
Title :
A wideband LNA with active balun for DVB-T application
Author :
Huang, Guochi ; Kim, Seong-Kyun ; Kim, Byung-Sung
Author_Institution :
RF Microelectron. Design Lab., Sungkyunkwan Univ., Suwon, South Korea
fYear :
2009
fDate :
24-27 May 2009
Firstpage :
421
Lastpage :
424
Abstract :
This paper presents a two-stage wideband low noise amplifier (LNA) with active balun. The first stage adopts current bleeding and dc coupled common-drain feedback techniques to achieve high gain low noise figure and acceptable input matching over a wide frequency band. A conventional single-ended to differential convertor is used as a second stage. The proposed wideband LNA is designed for DVB-T application and implemented in 0.18-mum CMOS technology. The circuit achieves a 1 GHz bandwidth ranging from 10 MHz to 1 GHz over which the measured gain is 23 dB and the noise figure ranges from 1.61 to 3.81 dB. The measured gain ripple and phase differences in the entire pass band of the proposed LNA are less than 0.6 dB and 3.8deg, respectively. This LNA core dissipates 21.6 mW power.
Keywords :
CMOS integrated circuits; UHF amplifiers; UHF integrated circuits; VHF amplifiers; baluns; digital video broadcasting; low noise amplifiers; wideband amplifiers; CMOS technology; DVB-T application; active balun; dc coupled common-drain feedback technique; differential convertor; frequency 10 MHz to 1 GHz; gain 23 dB; gain ripple; noise figure 1.61 dB to 3.81 dB; phase difference; power 21.6 mW; size 0.18 mum; two-stage wideband low noise amplifier; wideband LNA; Active noise reduction; Broadband amplifiers; CMOS technology; Digital video broadcasting; Gain measurement; Hemorrhaging; Impedance matching; Low-noise amplifiers; Noise figure; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
Type :
conf
DOI :
10.1109/ISCAS.2009.5117775
Filename :
5117775
Link To Document :
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