IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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A widely tunable active-RC complex filter for multi-mode wireless receivers with automatic frequency tuning
Ruoyu WangMin LinHongmin WangShulong Sun
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2016 Volume 13 Issue 18 Pages 20160764

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Abstract

A 5th-order Chebyshev active-RC filter has been implemented in TSMC 0.13µ CMOS technology. With the feature of multi-mode, it has 8 different bandwidth modes including 6 Real Low-pass modes and 2 Complex band-pass modes for wireless sensor network applications. Combined with a special kind of Miller compensation method, the OTA’s stability is observably improved. Also, to eliminate the effect of temperature and process variation, an automatic frequency tuning scheme is applied. The filter measures a 0 dB gain and 0.9 dB ripple in passband. It also measures an input-referred noise of and in-band-IIP3 of 25 dBm while consuming 15 mA current from 1.3 V supply. The tuning circuit has a precision of 2% and covers a range of 30%.

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© 2016 by The Institute of Electronics, Information and Communication Engineers
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