A micropower electrocardiogram amplifier
Author(s)Sarpeshkar, Rahul; Fay, Leon; Misra, Vinith
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We introduce an electrocardiogram (EKG) preamplifier with a power consumption of 2.8 muW, 8.1 muV[subscript rms] input-referred noise, and a common-mode rejection ratio of 90 dB. Compared to previously reported work, this amplifier represents a significant reduction in power with little compromise in signal quality. The improvement in performance may be attributed to many optimizations throughout the design including the use of subthreshold transistor operation to improve noise efficiency, gain-setting capacitors versus resistors, half-rail operation wherever possible, optimal power allocations among amplifier blocks, and the sizing of devices to improve matching and reduce noise. We envision that the micropower amplifier can be used as part of a wireless EKG monitoring system powered by rectified radio-frequency energy or other forms of energy harvesting like body vibration and body heat.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
IEEE Transactions on Biomedical Circuits and Systems
Institute of Electrical and Electronics Engineers
Fay, L., V. Misra, and R. Sarpeshkar. “A Micropower Electrocardiogram Amplifier.” Biomedical Circuits and Systems, IEEE Transactions on 3.5 (2009): 312-320.© 2009 Institute of Electrical and Electronics Engineers.
Final published version
INSPEC Accession Number: 10890436
Common-mode feedback (CMFB), electrocardiograph (ECG), low noise, low power