An operational amplifier is shown in Figure 2. The op-amp has the following specifications: Input resistance Rin= 1M ohms Output resistance Ro= 200ohms Open-loop gain Ao = 100,000. Unity Gain

Bandwidth = 5MHZ a) i. Sketch the real circuit model for the amplifier. ii.write down the KCL equation at inverting terminal onthe circuit model write down the KCL equation at the output terminal on the circuit modelii. b) Draw a typical open-loop frequency response in (dB) for the op-amp. Indicate the open-loop DC gain, cut-off frequency and Unity Gain Frequency. (c) Determine the closed-loop bandwidth of the amplifier. The input signal is V(t)=0.1 \cdot \sin \left(2 \pi \times 500 \times 10^{3} t\right) V The output signal is V_{o}(t)=V_{-} \cdot \sin \left(2 \pi \times 500 \times 10^{3} t\right) V Determine the amplitude Vm of the output signal.