Problem 4.11 This problem concerns the circuit illustrated in Figure 4.29: VI www R₁ wwwww R₂ www R3 D₁ iD + VD www R4 Figure 4.29: R₁ = 1.0kΩ R2 = 1.0kΩ _ R3 = 0.5kΩ R4 = 1kΩ For D₁: ip = Is(e³D/VTH − 1) with Is = 1 × 10-⁹ A and VTH = 25mV. a) Find the Thévenin equivalent circuit for the circuit connected to the diode. b) Assume that for bias point determination the diode can be modeled by an ideal diode and a 0.6 volt battery. What are up and ip when v₁ = 4 volts? c) Find a linear equivalent model for this diode valid for small signal incremental operation about the bias point determined from part b.

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Nodal Analysis

In the analysis of any electric circuit, nodal analysis is the method of determining the potential difference or voltage between different nodes in an electric circuit. A node is a point where two or more branches connect each other. In the nodal analysis, the voltages are determined in the terms of branch currents. The nodal analysis is also known as the node voltage method or branch current method. The nodal analysis method is one of the several applications of Kirchhoff's Current Law (KCL).