3. A hybrid model amplifier is shown below. The parameters are h₁1 = 45ohms, h21 = 80, h₂2 = 12.5 us and h12 = 5 x 104. Select RL so that the current gain i2/i1 = 79 and the input resistance of the circuit is less than 10 ohms. h11 h2111

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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.