Digital Filter Designer

Overview

The Digital Filter Designer is a powerful application built using PyQt5 and Matplotlib. It allows users to design and visualize digital filters, including standard filters and all-pass filters, and generate corresponding C code. This tool is ideal for students, researchers, and engineers working in the field of digital signal processing.

Demo video

https://drive.google.com/file/d/1P7x8AQ1tuT9XlT_HM9brPxJPCl7oTAro/view?usp=sharing

Main Features

• Z-Plane Plotting: Visualize zeros and poles on the Z-plane.
• Standard Filter Design: Design Butterworth, Chebyshev, Bessel, and Elliptic filters.
• All-Pass Filter Design: Create custom all-pass filters and predefined all-pass filters.
• Real-Time Signal Plotting: Load signals from CSV files or draw signals using the mouse.
• Transfer Function Visualization: View the magnitude and phase response of the designed filter.
• C Code Generation: Generate C code for the designed filter for easy integration into other projects.

Getting Started

Prerequisites

Ensure you have the following installed:

• Python 3.x
• PyQt5
• Matplotlib
• NumPy
• SciPy
• Pandas
• Jinja2
• PyQtGraph

Installation

1. Clone the repository:

   git clone https://github.com/HarmoniCode/Digital-filter.git

2. Navigate to the project directory:

   cd Digital-filter

3. Install the required packages:

   pip install -r requirements.txt

Running the Application

1. Navigate to the project directory:

   cd Digital-filter

2. Run the main application:

   python main.py

Usage

Z-Plane Plotting

• Add zeros and poles to the Z-plane by entering their coordinates and clicking the "Add Zero" or "Add Pole" buttons.
• Visualize the effect of the zeros and poles on the filter's transfer function in real-time.

Standard Filter Design

• Select a standard filter type (e.g., Butterworth, Chebyshev) from the dropdown menu.
• The application will automatically plot the zeros and poles for the selected filter.

All-Pass Filter Design

• Create custom all-pass filters by adjusting the parameter a using the spinbox.
• Select predefined all-pass filters from the list of checkboxes.

Real-Time Signal Plotting

• Load a signal from a CSV file by clicking the "Load Signal" button.
• Draw a signal using the mouse by selecting the "Draw using Mouse" option.

Transfer Function Visualization

• View the magnitude and phase response of the designed filter in the transfer function plot.

C Code Generation

• Generate C code for the designed filter by clicking the "C Code" button.
• The generated code will be displayed in a pop-up window and saved and .c file .

License

This project is licensed under the MIT License.

Contributing

Contributions are welcome! Please fork the repository and submit a pull request with your changes. For major changes, please open an issue first to discuss what you would like to change.

Contact

For any questions or feedback, please contact HarmoniCode.