Recall the equation of the Z-parameters -- H = + V₂₁ 1 V₂ 2 I₁ U₁ 1. What is 211? 2. What is 212? Determine the Z-parameters (up to 4 decimal places) for the given circuit below with the following R values: R₁ = 50, R₂ 10Ω, R3 = 7.50, and R4 = 2.50. R₁ 3. What is 221? Z₁1 4. What is 222? Z21 Z12 R₂ Z22 R₂ 1₁ = I, 2 R4 1₂ + U ₂

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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.