Specifications Table

Product Material – High-grade PCB with metal-film resistors and ceramic capacitors

Grade – Laboratory/Research Grade

Application – Signal processing, noise reduction, frequency isolation

Product Overview

The Twin-T Active Notch Filter using Operational Amplifier is a precision-engineered circuit designed for selective frequency rejection in signal processing applications. Built with high-quality metal-film resistors and ceramic capacitors on a durable PCB, this filter provides sharp notch characteristics at the target frequency. The active configuration using an operational amplifier enhances the Q-factor, ensuring superior noise cancellation and frequency isolation compared to passive designs. The filter is optimized for laboratory use, offering stable performance across varying load conditions. Its compact design allows for easy integration into existing experimental setups, while the carefully selected components ensure minimal phase distortion and high linearity. The circuit’s response can be fine-tuned by adjusting component values, making it versatile for different frequency ranges. The filter operates efficiently at standard laboratory voltage levels and maintains its performance characteristics across typical environmental conditions found in research settings. The robust construction ensures long-term reliability, while the clear component labeling facilitates easy troubleshooting and modification.

FAQs

1. What is the typical frequency range this notch filter can handle?

The standard configuration is designed for audio frequency ranges, typically between 50Hz to 20kHz, but can be modified for other ranges by changing component values.

2. Can this filter be used with standard laboratory power supplies?

Yes, it’s designed to operate with common dual power supplies (±12V or ±15V) typically available in laboratory settings.

3. What makes this an active notch filter compared to passive designs?

The inclusion of an operational amplifier provides gain and improves the Q-factor, resulting in sharper notch characteristics and better performance than passive Twin-T filters.

4. How temperature-stable is this filter circuit?

The metal-film resistors and ceramic capacitors used provide good temperature stability, maintaining performance within ±5% across typical laboratory temperature ranges.

5. What’s the expected input impedance of this filter?

The input impedance is typically around 10kΩ, which is suitable for most signal sources found in laboratory equipment.