Question
Download Solution PDFIdentify the circuit
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Capacitor shows different characteristics when the frequency is varied.
The capacitive reactance is defined as:
When f = 0
XC = ∞. This implies that the capacitor will be like an “Open circuit”.
When f = ∞
XC = 0. This implies that the capacitor will be like a “Closed-circuit”.
Calculation:
The given circuit can be redrawn at the f = 0 by making the capacitors open the circuit:
Applying voltage divider potential at the positive terminal will be Vin(R4)/(R2+R4), which will appear across the battery's negative terminal using virtual ground concept.
From there we may conclude that output is not zero at f=0
The given circuit can be redrawn at the f = ∞, by making the capacitors open circuit.
The feedback element is shorted and the circuit is redrawn as:
The output will be of some finite value due to the negative feedback.
The resultant filter is the Band Stop Filter
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