The inverting amplifier shown in Figure P12.46 can be used as a low-pass filter. a. Derive frequency response of the circuit. b. If R1 = R2 = 100 k2 and C = 0.1 µF, compute attenuation in dB at w = 1,000 rad/s. R2 R1 Vin Ve c. Compute gain and phase at w = 2,500 rad/s. d. Find the range of frequencies over which the attenuation is less than 1 dB. out Figure P12.46

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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.