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.
Donno, A., D'Amico, S., De Matteis, M., Baschirotto, A. (2016). A 150MHz 3rd-order single Opamp continuous-time analog filter in 28nm CMOS technology. In Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems (pp.161-164). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICECS.2015.7440274].
A 150MHz 3rd-order single Opamp continuous-time analog filter in 28nm CMOS technology
De Matteis M.;Baschirotto A.
2016
Abstract
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.
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