Nanowatt Analog Filter Design
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Abstract
This paper presents the design of a nanowatt-power analog filter. Important parameters such as supply voltage, power consumption, cutoff frequency, noise, dynamic range, and figure of merit are considered in the design method. These parameters indicate the advantages and disadvantages of the designed filter. The paper provides an example of a 4th-order Chebyshev low-pass filter designed for an ECG detection system based on cascading two 2nd-order sections. The proposed circuit can operate at a 0.6 V supply, and the cutoff frequency can be adjusted from 50 Hz to 300 Hz, covering the entire frequency range of ECG signals. At a 150 Hz cutoff frequency, the proposed filter consumes 0.55 nW.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright @2021 Engineering Transactions
Faculty of Engineering and Technology
Mahanakorn University of Technology
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