1) Input signal is x(t)= 2sin(60rt)+3cos(610t). Apply a first order analog Butterworth low-pass filter with a cutoff frequency at 100 Hz to the input. What are the output amplitudes at the two frequencies? e 2) The same signal x(t) is now digitally sampled with the sampling frequency fs=300 Hz. Output y(n)=(x[n]+x[n=1]±x[n-2])/3, what is the output signal in the time-domain?k

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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.