Active filter circuit
The load of the active filter circuit does not affect the filter characteristics, so it is often used in applications where signal processing is required. The active filter circuit is generally composed of an RC network and an integrated operational amplifier, and must be used with a suitable DC power supply, and can also be amplified. But the composition and design of the circuit is also more complicated. Active filter circuits are not suitable for high voltage and high current applications and are only suitable for signal processing.