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　　Today, BPF i.e. Band Pass Filters have found their applications in different areas of electronics. Especially, they have found their wide usage in RF applications, where engineers use tuned circuits. In addition, for various ball bearing 6301 2RS ZZ low ranges of frequencies, active band pass filters provide best way to allow a filter to pass only a specified band of frequencies. For this, band pass filters incorporate one of the most active yet widely used elements i.e. operational amplifier or op amp. How BPF Op-amps are Helpful According to professors of a good engineering college in India i.e. Shri Ram Group, op-amp Band Pass Filters are easy to construct and design as well as requires only few components. Moreover, these filters are able to provide improved level of performance. Functions Performed by BPFs Band Pass Filter, as the name suggests, it allows passage to only specified band of frequencies, while attenuate every other frequency that remains outside of its range. Based on this fact, engineers of any good engineering college in India have revealed about two major areas of interest based on the response given by the filter. These are pass-bands, where filters pass signals and stop-band signals, where users will find attenuation of signals.

 

Since, in this type of filters engineers do not able to find any infinite steep rolling off, there would be transition area outside of the pass-band, in which response though falls but fails to reach the required range out of the attenuation area of the band. Professors of Shri Ram Group Jabalpur said that the design of any band pass filter involves utilization of operational amplifiers. However, engineers may simplify the design equations even after retaining acceptable performance level of the op-amp device installed in active filter to perform different types of applications. Circuit as well as design equations of Op-amps are responsible for representing a perfect balance in between performance levels and ease associated with circuit designs. Here, the design consists of three resistors and two capacitors, along with the operational amplifier. Since, engineers use only a single operational amplifier within the filter circuit, gain remains limited to only five or less than five, while Q within ten. Hence, individuals want to bring improvements in the shape factor of the BPF op-amp, they have to choose for the option of cascading its one or more than one stage. Along with this, engineers should give concern towards tolerance and high stability components to use for both capacitors and resistors. In this way, engineers will be able to obtain optimum performance of any operational amplifier filter. Author of this article is an Electronics and Communication Engineer of a reputed engineering college in India, who wanted to highlight about BPF, its circuit, functions and practical applications.

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