S. Vishnu Sharma
Researchers of IIT Mandi have taken up research work that will help extend the life of daily used electronic products like mobile phones, laptops, tablets.
Work done by researchers of IIT Mandi also enables the daily used gadgets to retain quality performance over the time.
Researchers of IIT Mandi who took up the research are Dr. Hitesh Shrimali and Mr. Vijendra Kumar Sharma. Dr. Hitesh is associate professor with School of Computing and Electrical Engineering at IIT Mandi.
Mr. Vijendra Kumar Sharma is a research scholar at IIT Mandi. Researchers of IIT Mandi conducted the research in association with Dr. Jai Narayan Tripathi from IIT Jodhpur.
Researchers of IIT Mandi give great push for performance
Researchers of IIT Mandi along with Dr. Jai Narayan Tripathi developed the performance analysis of miniaturized circuitry used in modern mobile devices such as mobile phones and tablets so that the devices may be designed for better performance even under erratic DC power supply.
Work done by researchers of IIT Mandi have been funded by Ministry of Electronics and Information Technology (MeitY).
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The results of the work by researchers of IIT Mandi have been published recently in IEEE Open Journal of Circuits and Systems.
Speaking about the research, Dr Shrimali one of the researchers of IIT Mandi said there is a need to understand the design equations that take into account the miniaturized parts of mixed electronic circuitry in order to improve the performance of the device and enhance the robustness of the components to power fluctuations.
Researchers of IIT Mandi analysed the losses that occur due to the power supply fluctuations to optimize the design specifications of mobile devices in terms of speed, power, gain, distortion levels among others.
The electronic circuitry in modern devices including mobile phones, laptops and tablets comprises both analog and digital components on a single semiconductor IC, say researchers of IIT Mandi.
Such mixed signal circuits are powered by a direct current supply, often from an in-built battery.
While these batteries have low voltages (3.7 V), the individual components of the miniaturized circuitry of mobile devices operate at even lower voltages.
For example, transistors used in many modern circuitries are as small as 7 nanometres – a 100000 times smaller than the width of a single human hair and require voltages far below 1 V to work.
Power spikes and fluctuations in the power source can degrade the performance of the mixed circuit over time, say researchers of IIT Mandi.
Thus, any fluctuations in power of the battery can lead to significant performance deterioration.
The designs of circuitry continue to use the concepts developed 20 years ago and have not considered the altered physics seen at nanometric size scales of modern electronics parts.
Very Large-Scale Integration (VLSI) electronics are ubiquitous in today’s world, although we are not aware of it”, says Dr. Shrimali, who led the researchers of IIT Mandi.
Transceivers, antennae, amplifiers, Analog-to-Digital Converters (ADC), and Digital-to-Analog Converters (DAC) that are the heart of commonly used devices such as mobile phones, digital music players, laptops and tablets require such optimizations in design to extend their life and retain quality of performance over time, say researchers of IIT Mandi.
‘We have used the matrix theory and closed form of equations for transistors to analyse the key design specifications for the design of electronics that use VLSI of miniaturized components,’ explains researcher who lead the team of researchers of IIT Mandi.
After developing the method, the team of researchers of IIT Mandi verified the proof-of-concept using two examples of output stages for analog and digital blocks in a standard 180 nanometre technology with 1.8 V of supply and same geometric area.
Their models using the inspection method and the industry standard SPICE tools showed a maximum mean percentage error (MPE) of 3% for all the examples, which confirms the robustness of this approach in designing electronic components that are not adversely affected by power fluctuations.
The published research will improve the efficiency of high speed on-chip systems.