NDLI: Channel filters for microelectronic receivers of wireless systems

Content Provider	IEEE Xplore Digital Library
Author	Korotkov, A.S. Morozov, D.V. Tutyshkin, A.A. Hauer, H.
Copyright Year	2005
Description	Author affiliation: St. Petersburg State Polytech Univ., Russia (Korotkov, A.S.; Morozov, D.V.; Tutyshkin, A.A.)
Abstract	A short overview of receiver architectures and low-pass filter specifications for wireless systems is reported. Two design procedures of low-pass filters for communication system are discussed. A CMOS transconductance-capacitor (G/sub m/-C) filter with enhanced linearity is presented as the first one. The proposed design is based on a transconductance amplifier with enhanced linearity. For the elimination of the amplifier harmonic level the compensation principle is used. The device was realized as a balanced fifth-order 1 MHz low-pass Bessel filter in 0.35 /spl mu/m CMOS process. The filter operates with a low supply voltage of +2.5 Volt. Its power consumption is 8.25 mW, the input referred RMS noise is 120 /spl mu/V (0.01 + 2 MHz), and HD3 (1 V/sub P-to-P/ @ 1 MHz) is -54 dB. Alternatively a new approach to the design of high-frequency filters with low power consumption is presented. The idea is to use current mode and voltage mode active elements with enhanced frequency range. These elements are second generation current conveyors and voltage buffers, those are used to implement integrators. The filter is realized as a switched-capacitor circuit based on an integrator chain with multi feedback loops. As an example a CMOS switched-capacitor filter with 1 MHz cut-off frequency is presented. The device was realized as an unbalanced fifth-order low-pass Chebyshev filter in 03 /spl mu/m CMOS process. The filter operates with supply voltage varying from +2.5 V to +3 V. Depending on the supply voltage its power consumption is from 3 mW to 10 mW, the input referred RMS noise is 1.9 mV (0.02 + 2 MHz @ +3 V), and HD3 (2 V/sub P-to-P/ @ 900 kHz @ +3 V) is -54 dB.
Starting Page	24
Ending Page	31
File Size	626984
Page Count	8
File Format	PDF
ISBN	5742208952
DOI	10.1109/EMRTW.2005.195673
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-23
Publisher Place	Russia
Access Restriction	Subscribed
Rights Holder	St. Petersburg State Polytechnical Univ.
Subject Keyword	Energy consumption Bluetooth High-frequency microelectronic filter Low pass filters Gm-C filter low power consumption switched-capacitor filter dummy switch CMOS process WLAN Microelectronics second generation current conveyor DECT Power harmonic filters Low voltage Power filters voltage buffer transconductance amplifier Linearity Frequency Transconductance cell phones
Content Type	Text
Resource Type	Article

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