The dissertation is a very crucial part of the MTech program in Biomedical Engineering at Amrita Vishwa Vidyapeetham. The students are given the freedom to choose from a variety of specialisations like Biosensors, Biomaterials, Computational Drug Design, Biomedical Image / Signal Processing and Biomedical Instrumentation, making the programme truly inter-disciplinary. They are actively encouraged to think out of the box and go beyond the confines of their curriculum, to come up with work that is outstanding – Amrita demands no less. A few of the projects done in the last couple of years are shown here.
Manufacturing of Integrated Circuits (ICs) done mostly by the third party vendors at distant foundries makes the ICs more vulnerable to tampering by the addition of Hardware Trojan (HT).>This work proposes a fingerprint based methodology to detect the presence of the Hardware Trojans present in the design. Hardware implementation of this technique is done by considering the Xilinx FPGA environment. The technique is implemented on a set of ISCAS89 and ISCAS85 benchmark circuits. The results shows the proposed segmentation technique is better than compared to Region based segmentation technique based on reduced overlapping of gates.
A TRNG is a generator which generates the random bits by utilizing the physical process in the circuit. A random number generator includes a noise source which generates the continuous time signal and that continuous signal is digitized using a sampler. The commonly employed method is based on jitter. The usage of jitter in ring oscillator aids in obtaining a high-speed real-time random number generator (RNG). The statistical tests along with internal tests are conducted as an added advantage to ensure security to the architecture. National Institute of Standards and Technology (NIST) tests validated the unpredictability and randomness of the True random number (TRN) generated.
Infotainment systems use various communication interfaces to connect to various other peripherals within and outside the Head unit. The project focuses on developing a test platform along with suitable software stack to automate driver level testing of communication interfaces. The study evaluates the limitations of existing verification methods and addresses the feasibility of utilizing Commercial-Off-The- Shelf (COTS) hardware platforms. The design of a software stack to control the test board and automate the test process has been described. Finally, the design of the system using a FPGA platform which provides an additional avenue has been explored.
The project focuses on designing a CMOS based current reuse voltage controlled oscillator(VCO)with a lower phase noise and improved figure-of-merit (FOM) to operate in a frequency range of (2.07-2.79)GHz. This aims to design on-chip spiral inductor with improved L-density and Q-factor and making use of it in the design of VCO. The use of ferrite film as magnetic enhancement results in an improvement in L-density and Q-factor of the inductor. The proposed inductor improves the L-density by 78.1% and the Q-factor by 53.8% as compared to air core inductor. The 65 nm LC-VCO using the proposed inductor exhibits lower phase noise of -115.96 dBc/Hz and -135.01 dBc/Hz at an offset of 1 MHz and 5 MHz respectively. Measurements show that the proposed VCO consumes a power of 2.85 mW from a supply of 1.1 V.