Hobby & Projects – Subha Sarkar

Projects

S-band FMCW Radar (B.tech. FYP2)

We embarked on a project to build an S-band radar using off-the-shelf ICs, aiming to gain insights into the complexities of RF design. While some modules successfully performed as expected and are in our possession, others encountered issues and are still a work in progress. We remain optimistic about completing the project in the future.

Low power standalone AWG (B.tech. FYP1)

We've engineered a comprehensive end-to-end arbitrary waveform generator, utilizing a single microcontroller to handle all functions seamlessly, from waveform generation to LCD control and USB connectivity. This achievement boasts a remarkable sampling rate of 6.000MSPS from a 72MHz microcontroller.

Lambertian model using C++ & OpenCV

I've experimented with creating a moon-like image to explore how we perceive three-dimensional objects on a two-dimensional plane, employing the principle of Lambertian reflectance. My toolkit included the OpenCV library, C++, and a Raspberry Pi 2.

IEEE 754 Single precision FPR

I designed a synthesizable single-precision floating-point unit using Verilog. While I didn't pursue further optimization, I've made it available for learning purposes. Feel free to explore and glean insights from it.

Sine wave using CORDIC (Verilog)

I successfully implemented a CORDIC Verilog code on an FPGA to generate I-Q signals. The FPGA's digital outputs were then converted to analog signals using an R-2R ladder, resulting in the desired waveform.

Synchronous PWM Buck Converter (Academic Project)

In this LTSpice simulation project, I've meticulously designed and simulated a transistor-level buck converter. It incorporates essential features such as a sub-1V bandgap reference, soft-start mechanism, compensation, and over-current protection.

Simulation of High-Performance Op-Amp (Academic Project)

We conducted a simulation of a high-performance, transistor-level fully differential operational amplifier. It has a unity gain bandwidth of 1 GHz and a DC gain of 110 dB. To maintain stability during sharp common mode transients, common mode feedback circuits were meticulously designed. Remarkably, the achieved settling time, encompassing both dynamic and static components, was an impressive 5 ns.

Low Noise Amplifier (Academic Project)

This is a simulation based (Mentor Graphics ELDO) project in which an entire transistor level Low noise Amplifier was designed and simulated. Inductive degeneration, High Gain (15dB), Noise Figure (2.15dB), Input return loss (<10dB), Moderate reverse isolation (>50dB), Very low output return loss (for discrete LNAs) are key features here.