Design and Implementation of Universal Biquad Filter

This project centers on the analog circuit design of a universal biquad filter targeting a corner frequency of 1 kHz and a quality factor (Q) of 10. The design process spans the complete development cycle—from initial specification and simulation to physical layout and hardware realization. Key phases include schematic design, functional modeling, simulation, and full PCB development.

Modern simulation environments and open-source platforms played a pivotal role throughout the project. The schematic capture and performance analysis—covering both frequency and time domains—were conducted using KiCad, which was also used for PCB layout and implementation. Functional modeling was performed using the Analog System Lab Kit (ASLK) and Red Pitaya, with the latter offering a flexible and cost-efficient solution for capturing frequency responses from ASLK-based implementations.

The project workflow is tightly integrated with reproducible tools such as Quarto, Jupyter Notebooks, Python, NumPy,Scipy, Control and Matplotlib for analysis, visualization, and documentation. Version control and collaboration were managed through Git, ensuring transparency and traceability at each stage.

Note: All design files, source code, and documentation are publicly available in our GitHub repository.