A 5M-50M reconfigurable Gm-C low-pass filter in 130nm CMOS for SDR receivers

A third order Gm-C reconfigurable Butterworth low-pass filter for SDR receivers with a tunable cutoff frequency of 5M to 50M is presented. A positive feed-forward compensation Gm-cell is utilized to improve the linearity of the filter. The filter has been implemented in SMIC 130nm CMOS process. It o...

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Bibliographic Details
Main Authors: Ling Fu, Baoyong Chi, Hongxing Feng, Zhihua Wang
Format: Conference Proceeding
Language:English
Subjects:
Cutoff frequency
Linearity
Low pass filters
MOSFETs
RLC circuits
Transconductance
Tuning
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Summary:A third order Gm-C reconfigurable Butterworth low-pass filter for SDR receivers with a tunable cutoff frequency of 5M to 50M is presented. A positive feed-forward compensation Gm-cell is utilized to improve the linearity of the filter. The filter has been implemented in SMIC 130nm CMOS process. It occupies 0.63 mm 2 die area and consumers 12mA - 16mA current with a 1.2V power supply. The measured in-band IIP3 is about 10.5dBm, and out-band IIP3 up to 26.3dBm.
DOI:10.1109/ICSICT.2010.5667739