V10 R₁ www (a) R₂ Problem 2 V10 V20- R₁ Part II: Examine Figure (b) (3) Assume R₁ and R₂ b) Find the value of R3 www (b) R₂ www Assume op-amp is ideal with very large open loop gain A→∞ Part I: Figure (a) 1) What is the closed loop voltage gain of the op-amp circuit in figure (a) above in terms of R₁ and R₂ ? (2) 2) Find R₁ and R₂ such that the closed loop gain is – 5 V/V and sum of resistances is 120 k 2. (6) Vo 3) Find the cut-off frequency if the 3 dB frequency for the op-amp circuit is 5 kHz ? (4) have the same values as in figure (a) R, to make the output voltage v₂=-5v₁-4v₂

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Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.