lab name
Research Focus:
Research in the ULP Lab focuses on developing very low voltage and very low power digital and mixed-signal circuits for next generation electronics. Current research projects are focused in the following areas: Open Positions:
We are always looking for bright students who want to pursue their PhD or MTech. thesis. Interested students should contact Dr. Mishra with their full CV.



Active Research Projects:

Device for Bedload Measurement
Project Description
Bed load measurement gives the prediction of bed load transporting at a given point which is helpful in hazard management in coastal areas. An amount of snow melt or health of a dam can be predicted indirectly. The purpose of the project is to develop a system for continuous and automatic recording of a bed load mass passing at a flume or a river. A load cell based system for underwater measurement of the bed load mass is developed. The system also consists of other sensors integrated to enable an IoT based monitoring system.

Current Research Team and Collaborators: Dr. B. Mishra, V. Vardiwale and Dr P. Mohapatra (IIT-GN)

Sponsoring Agency: IMPRINT-2, DST, Govt. of India

Key Publications:

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Fully Digital FrontEnd ExG Acquisition System
Project Description
The main aim of the project is to build a low power, low cost fully digital ECG Front End Acquisition with Configurable Time to Digital Converter (ASIC). The design eliminates various analog block such as differential amplifiers, filters, and passive elements like switched capacitors and incorporates time-domain amplification, moving average filtering and offset cancellation techniques. The system is designed in sub-threshold region for low power consumption.

Current Research Team: Dr. B. Mishra and P. Patel

Sponsoring Agency: Core Research Grant, DST, Govt. of India

Key Publications:

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Cattle Health Monitoring System using IoT For Resource Constrained Regions
Project Description
Insufficient herd fertility due to poor estrus detection significantly affects the dairy cattle sector. Studies indicate that when cows enter the estrus phase, it shows various behavioral signs among which, high activity is prominent behavior and can be used as a measure for onset of estrus. This increase in activity can be detected by monitoring the number of steps taken by the cow in a particular period of time. In this project, we aim todesign and develop a cattle health monitoring system, utilizing low cost sensors, energy harvesters and Internet of Things (IOT) techniques to facilitate real-time monitoring and aims develop an affordable real time monitoring system targeted for resource constrained regions.

Current Research Team: Dr. B. Mishra and Y. Mehta

Sponsoring Agency: DST-SSTP, Govt. of India

Key Publications:

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Detection and Classification of Atrial and Ventricular Cardiovascular Diseases
Project Description
In our work, we are analysing the ECG signals in Real Time domain to detect various heart anomalies. The system is envisaged to be useful for the rural health care and remote health management for the resource constrained regions. The system provides automated detections for various Atrial and Ventricular Cardiovascular diseases. The developed system classifies most of the cardiac conditions such as arrhythmias, Myocardial Infarction, Atrial Fibrillation, Hypocalcaemia, Hypercalcaemia, AV node anomalies with only 4 electrodes on limb locations compared to the conventional 10 electrodes and does not require any medical assistance for placement of electrodes.

Current Research Team: Dr. B. Mishra and N.Arora

Sponsoring Agency: DA-IICT, Gandhinagar

Key Publications:
  • Neha Arora and Biswajit Mishra, "Characterization of a Low Cost, Automated and Field Deployable 2-Lead Myocardial Infarction Detection System," in 12th International Conference on COMmunication Systems and NETworkS, COMSNETS 2020, Jan 7-11, Bengaluru, India.
  • Neha Arora, Biswajit Mishra and Yash Vora, "A Low Power Wearable Device for Real-Time ECG Monitoring and Cardiovascular Arrhythmia Detection for Resource Constrained Regions," in Journal of Low Power Electronics, Vol 15, No. 3, June 2015.

  • More about this project.
    Low Voltage Power Management Unit for Energy Harvesting Circuits
    Project Description
    Emerging ULP applications require energy harvesters for complete energy autonomy, where battery replacement is cumbersome. Energy harvesting from solar, thermal, piezo, electromagnetic, RF and several other techniques exist that convert micro harvested energy to useful electrical energy.

    In many battery powered systems, lower input voltages are exploited using novel circuits. This project focuses on the development of low voltage ultra low power PMUs.


    Current Research Team:
    Dr. B. Mishra and P. Patel

    Key Publications:
  • P Patel and Biswajit Mishra, "Power Management Unit along with Load Regulation using Switched Capacitor Converters using 0.18um CMOS," in J. Low Power Electron. 15, No.3, June 2019.
  • Purvi Patel and Biswajit Mishra, "Low Power Management Unit with Load Regulation using DC-DC Switched Capacitor Converters in 0.18um CMOS," in IEEE Int. Symposium on Embedded Computing and System Design, 2018, India.

  • More about this project.


    Completed Research Projects:

    Nanowatt Power Management Unit for Energy Harvesting Circuits
    Project Description
    Emerging ULP applications require energy harvesters for complete energy autonomy, where battery replacement is cumbersome. Energy harvesting from solar, thermal, piezo, electromagnetic, RF and several other techniques exist that convert micro harvested energy to useful electrical energy.

    In many battery powered systems, lower input voltages are exploited using novel circuits. This project focuses on the development of low voltage ultra low power PMUs.


    Current Research Team:
    Dr. Biswajit Mishra and Sanjay Kasodniya

    More about this project.

    Low Power Circuits for Time to Digital Converters
    Project Description
    The main advantages of digital circuit over analog circuit are their ability to exploit technology scaling and robustness against noise. Mixed signal blocks, act as interface between the DSP cores and analog signals, used to convert analog signal into digital in voltage domain. On the other hand, TDC converts the analog signal into digital in time domain. As the technology is scaled down, the amplitude resolution decreases and temporal resolution improves. So the mixed signal blocks can be replaced by the digital TDC, exploiting the technology scaling.

    The TDC has various emerging application like measurement of time interval between two single shot event, distance measurement, ADC etc.


    Current Research Team:
    Dr. Biswajit Mishra, Ankur Pokhara and Jatin Agrawal

    More about this project.

    Circuits and Systems for Environmental and Healthcare Monitoring
    Project Description
    Autonomous or batteryless systems enable electronics to be operated without the need for replacement of batteries that are often expensive and cumbersome. A system gains energy autonomy or energy neutrality, if the energy consumed over a given time period is less than or equal to the energy harvested during the same time period. Micro energy harvesting from ambient sources such as solar, thermal, piezo and RF prove to be a viable alternative for energy autonomy in Wireless Sensor Nodes (WSN) with applications ranging from healthcare, automobile and smart buildings.

    In this research, we propose a system based on solar energy harvesting solution and associated circuits for Energy Neutral Health Monitoring and Environmental Monitoring Wireless Sensor Node within an indoor environment.


    Current Research Team:
    Dr. Biswajit Mishra, J.B. Shah and Ankur Pokhara

    More about this project.

    Lightweight Reconfigurable Hardware for DSP Applications
    Project Description
    This work focuses on the hardware implementation of a novel reconfigurable architecture targeting biomedical signal processing applications. The architecture is capable of performing various digital signal and image processing functions such as CORDIC, FIR filtering, 2D convolution, DCT and wavelet transformations.

    We present mapping of several DSP algorithms on this reconfigurable architecture with results verified on hardware.


    Current Research Team:
    Dr. Biswajit Mishra and N. Jain

    More about this project.
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