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A low power gm-c filter with on-chip automatic tuning for a WLAN transceiver

Journal of Semiconductors 2010年第6期31卷 118-123页

作者：刘斯琳马何平石寅 Institute of Semiconductors chinese Academy of Sciences

A sixth-order Butterworth gm-c low-pass filter（LPF） with a continuous tuning architecture has been implemented for a wireless LAN（WLAN） transceiver in 0.35μm cMOS *** interior node scaling technique has been applied directly to the LPF to improve the dynamic range and the structure of the LPF has been optimized to reduce both the die size and the current *** results show that the filter has 77.5 dB dynamic range,16.3 ns group delay variation,better than 3%cutoff frequency accuracy,and 0 dBm passband *** whole LPF with the tuning circuit dissipates only 1.42 mA（5 MHz cutoff frequency） or 2.81 mA（10 MHz cutoff frequency） from 2.85 V supply voltage,and only occupies 0.175 mm^2 die size.

关键词： gm-c filter interior node scaling frequency automatic tuning

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A current Mode Low-Noise gm-c filter with a cut-Off Frequency of 5 GHz in Telecommunication System

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Transactions of Nanjing University of Aeronautics and Astronautics 2022年第4期39卷 493-498页

作者： WU Xu LI Lianming School of Information Science and Engineering Southeast UniversityNanjing 210096P.R.China National Mobile communication Research Laboratory Southeast UniversityNanjing 210096P.R.China Purple Mountain Laboratories Nanjing 210096P.R.China

The high linearity low-noise filter is an indispensable key circuit in the communication *** on the structure of current-reuse source-degradation operational transconductance amplifier(OTA),a 5 GHz current-mode low-noise gm-c filter suitable for high-speed communication systems is *** to the proposed current mode structure and the OTA’s high-power efficiency and high linearity,the filter obtains good noise and high linearity performance with very low power *** filter is designed in standard 65 nm cMOS technology and occupies a core area of 0.06 mm^(2).The simulation results show that the operating bandwidth is 5 GHz,the IIP3 is35 d Bm,and the power consumption is only 3.2 m W.

关键词： gm-c filter lowpass filter current mode filter

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Harmonic Distortion Modeling of Fully-BalancedThird-order Butterworth gm-c filter by a Block Diagram Approach

Harmonic Distortion Modeling of Fully-BalancedThird-order Bu...

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2011 International conference on computer Science and Information Technology(IccSIT 2011)

作者： Yingwu Miao Yuxing Zhang School of Electronic Engineering University of Electronic Science and Technology of china

ISBN: (纸本)9781612848334

Accurate distortion modeling of fully-balanced gm-c filter is the main subject of this paper. Based on the phasor method, a block diagram approach was developed in this paper. To demonstrate the flexibility of this approach, a third-order Butterworth gm-c filter was analyzed by using the proposed approach. A good agreement is shon between theoretical analysis and transistor level simulation by Spectre. The approach is suitable to be used in early steps of the design and it can give the designer a thorough understanding of the distortion of fully-balanced gm-c filters.

关键词： harmonic distortion nonlinear distortion gm-c filter block-diagram approach phasor method.

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