Electronic Filter and Its Application

Abstract

Electronic filters, a analogue circuits, performs signal processing functions, specifically to remove unwanted frequency components from the signal, to enhance wanted ones, or both are an important components in many electronic devices, especially signal processing equipments. A common need for filter circuits is in high-performance stereo systems, where certain ranges of audio frequencies need to be amplified or suppressed for best sound quality and power efficiency. Equalizers, a filter, allows the amplitudes of several frequency ranges to be adjusted to suit the listener's taste and acoustic properties of the listening area. Application of filter circuits in the "conditioning" of non-sinusoidal voltage waveforms in power circuits is nowadays a notable area. Some electronic devices are sensitive to the presence of harmonics in the power supply voltage, and so require power conditioning for proper operation. If a distorted sine-wave voltage behaves like a series of harmonic waveforms added to the fundamental frequency, then it should be possible to construct a filter circuit which allows practical application of filter circuits is in the “conditioning†of non-sinusoidal voltage waveforms in power circuits. Some electronic devices are sensitive to the presence of harmonics in the power supply voltage, and so require power conditioning for proper operation. In such instrument filter allows only the fundamental waveform frequency to pass through, blocking all (higher-frequency) harmonics. Here author has discussed about filter and its types along with application in short.