(a) The gain of a bandpass filter at its lower cutoff frequency is 12. The upper cutoff frequency is 11.2 kHz and the Qis 30. Determine: (0) The gain at the centre frequency (i) The centre frequency (i) The bandwidth (b) The input to the filter in (a) has the following components: Vi1: 2V rms at 2 kHz and Vi2: SV rms at 20 KHz Determine the rms values of these compoinents in the filter's output.

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Filter

A filter is a device or process which removes some of the unwanted features or components like frequencies from a signal in signal processing. The feature of filters is the complete or partial suppression of some part of the signal, and filtering is a class of signal processing. This most often means removing some frequency bands or some frequencies. In the frequency domain, the filters do not exclusively act, especially in the image processing field many other targets for filtering exist. Without having to act in the frequency domain, the correlations can be removed for certain frequency components and not for others. The filters are widely used in electronics and telecommunication, in television, radio, radar, audio recording, music synthesis, control systems, computer graphics, and image processing.