Active Filters using Operational Amplifier

The Active Filters using Operational Amplifier apparatus manufactured by Glass Agencies under the EROSE brand is an educational laboratory instrument developed to demonstrate and analyze frequency-selective filtering using op-amp circuits. This apparatus is widely used in electronics and physics laboratories of educational institutions, engineering colleges, and training centers to help students understand the principles of active filtering, frequency response, and signal processing. The system allows learners to study low-pass, high-pass, band-pass, and band-stop filter configurations implemented with operational amplifiers, providing hands-on experience with real circuits. The apparatus is built using quality electronic components mounted on a sturdy panel that ensures stable operation and repeated experimental use. Clearly labeled terminals and circuit layouts make it simple to connect input and output signals to measurement devices such as oscilloscopes, function generators, and multimeters, allowing accurate observation and analysis of filter characteristics. Students can explore the effects of component values on cutoff frequency, gain, and filter response type, helping link theoretical concepts with practical circuit behavior. The apparatus supports experimentation with single-stage and multi-stage filters, illustrating how active components enhance signal control compared to passive filters. Adjustable input signal levels and provision for testing various frequencies enable learners to study amplitude and phase response across the frequency spectrum. Each Active Filter using Operational Amplifier unit manufactured by Glass Agencies undergoes strict quality inspection to ensure correct op-amp operation, secure connections, stable voltage supply, and compliance with laboratory safety standards. The compact and organized construction allows convenient placement on laboratory benches, easy handling, and safe storage when not in use. This apparatus is suitable for classroom demonstrations, practical exercises, and laboratory experiments that strengthen students’ understanding of electronic signal processing and filter design. With its dependable components, clear layout, and educational functionality, the Active Filters using Operational Amplifier apparatus from Glass Agencies under the EROSE brand provides a reliable platform for learning about frequency-selective circuits, op-amp behavior, and practical applications of active filtering. It enhances comprehension of signal manipulation, frequency response, and circuit performance in a controlled laboratory environment, supporting effective teaching, learning, and experimental analysis in electronics and communication engineering education.