A 150MHz 3rd-order single Opamp continuous-time analog filter in 28nm CMOS technology

An improved Active-Gm-RC filter architecture is proposed in this paper. With respect to the biquad Active-Gm-RC cell, this architecture exploits the second pole of the Opamp to increase the filter order up to 3, while maintaining single Opamp topology. This reduces the required power per pole. A pro...

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Bibliographic Details
Published in2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS) pp. 161 - 164
Main Authors Donno, Andrea, D'Amico, Stefano, De Matteis, Marcello, Baschirotto, Andrea
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2015
Subjects
Active-Gm-RC
CMOS 28nm
continuous-time Analog filter
Low-power
Low-voltage
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Summary:An improved Active-Gm-RC filter architecture is proposed in this paper. With respect to the biquad Active-Gm-RC cell, this architecture exploits the second pole of the Opamp to increase the filter order up to 3, while maintaining single Opamp topology. This reduces the required power per pole. A prototype of the low-pass filter has been designed in 28nm CMOS technology. The filter power consumption is 340μW with a 0.9V voltage supply, cut-off frequency is 150MHz achieving a Figure-of-Merit of 165dB.
DOI:10.1109/ICECS.2015.7440274