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Q. Explain about Differentiator?
Shown in Figure is a differentiator which is obtained by replacing R1 in the inverting amplifier of Figure by a capacitor C. Assuming ideal op-amp characteristics, one has i = iC and vo = - Ri = - RiC. But since iC (t) = Cdvin (t) /dt ,we get
vo (t) = - RC dvin (t) / dt
which corresponds to a differentiator with a gain of -RC. In practice, however, differentiators are normally avoided because of high-frequency noise (which is accentuated due to a transfer function that increases with frequency) and stability problems (which make them oscillate).
Q. Effect of feedback on stability? Let us consider the direct transfer function of the unstable first-order system of Figure (a). The transfer function is given by whe
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Customer Indexing: Customer indexing (CI) is a method for enumerating the total number of consumers in a utility and tagging them to their respective poles, transformers and f
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