V.J. Kumar
Indian Institute of Technology Madras
40 Papers
327 Citations
V.J. Kumar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Signal conditioning & Capacitive sensing. The author has an hindex of 15, co-authored 39 publications. Previous affiliations of V.J. Kumar include Indian Institutes of Technology.
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Papers
Use of Fourier Series Analysis for Motion Artifact Reduction and Data Compression of Photoplethysmographic Signals
TL;DR: Experimental results indicate that the proposed method is insensitive to heart rate variation, introduces negligible error in the processed PPG signals due to the additional processing, preserves all the morphological features of the PPG, provides 35 dB reduction in motion artifacts, and achieves a data compression factor of 12.
177
A transform domain SVD filter for suppression of muscle noise artefacts in exercise ECG's
TL;DR: A significant advantage resulting from the application of the proposed SVD filter lies in its ability to perform noise suppression independently on a single lead ECG record with only a limited number of data samples.
101
A Novel Calibration-Free Method of Measurement of Oxygen Saturation in Arterial Blood
TL;DR: A novel method of computation of SpO2 that does not require the use of a calibration curve is presented, based on a model for the attenuation of light through skin, tissue, bone, and blood, that becomes free of not only patient but sensor-dependent parameters as well.
91
Analysis of the Switched-Capacitor Dual-Slope Capacitance-to-Digital Converter
Boby George,V.J. Kumar +1 more
TL;DR: A dual-slope capacitance-to-digital converter that operates on the elements of a differential capacitive sensor and provides a digital output that is linearly proportional to the physical quantity being sensed by the sensor is presented and analyzed in this paper.
68
A Linearizing Digitizer for Wheatstone Bridge Based Signal Conditioning of Resistive Sensors
TL;DR: A novel signal conditioning scheme, which provides a linear-digital output directly from the resistive sensor(s) that are connected in such bridge configurations, and drastically reduces the effect on the output due to the lead wires that connect the Wheatstone bridge and the DSADC.
66