![]() ![]() In electronics and signal processing, a filter is usually a two-port circuit or device which removes frequency components of a signal (an alternating voltage or current). A medium-complexity example of a band-pass filter.Ī band-pass filter or bandpass filter ( BPF) is a device that passes frequencies within a certain range and rejects ( attenuates) frequencies outside that range. JSTOR ( February 2008) ( Learn how and when to remove this template message)īandwidth measured at half-power points (gain −3 dB, √ 2/2, or about 0.707 relative to peak) on a diagram showing magnitude transfer function versus frequency for a band-pass filter.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification. ![]()
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