An active filter is a type of analog circuit that implements an electronic filter to a signal using active components such as an amplifier. When an amplifier is included in a filter design or application, it can improve the predictability and performance of the filter.

Types of Active Filters

• Brand Pass Filters
• Brand Reject Filter
• High Pass Filter
• Low pass Filter
• Quad Filters and Universal Filters are devices that can be programmed to perform one of the other types of active filters
• Notch Filter