Deepa Unnikrishnan joined Amrita University as Assistant Professor at the Department of Electronics and Communication Engineering, Amrita School of Engineering, Coimbatore Campus on August 5, 2013 after pursuing her MTech in Biomedical Engineering from Amrita University. Deepa pursued her BTech in ECE from Calicut University. Her areas of interest include Biomedical Instrumentation and Analog Electronic Circuits.


Research Expertise

  • PG Project: Synthetic ECG and PPG Signal Generation Using Pulse Shaping Technique


  • Electronic Circuits I & I
  • Digital Electronics
  • Fundamentals of Electrical Technology
  • Biomedical Instrumentation
  • Control Systems


Publication Type: Conference Paper
Year of Conference Publication Type Title
2015 Conference Paper V. V and Unnikrishnan, D., “Synthetic ECG and PPG signal generation using pulse shaping technique”, in 2015 Annual IEEE India Conference (INDICON), 2015.[Abstract]

This paper presents the generation of synthetic Electrocardiogram (ECG) and Photoplethysmogram (PPG) signals using electronic circuits which can be used for testing, calibration and maintenance of ECG machines and pulse oximeters and for the study of those biomedical signals. ECG and PPG signals were generated for different heart rate, varying from 50 to 150 beats per minute, using a potentiometer connected to the analog input port of the microcontroller. Individual components for both the ECG and PPG signals were generated using pulse shaping techniques and were added together to form the complete signal. The different pulse wave components were generated using an astable multivibrator and microcontroller for ECG and PPG respectively. These components were further shaped using low pass filters. The amplitude of P, QRS and T wave of ECG and shape of dicrotic notch in PPG can be changed by varying the potentiometer. More »»
Publication Type: Conference Proceedings
Year of Conference Publication Type Title
2013 Conference Proceedings D. Unnikrishnan, “EOG Based Human Machine Interface for Assisted Mobility”, International Conference on Biotechnology for Innovative Applications (Amrita BioQuest 2013). 2013.
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