Exercise 4 The three terminal device shown in Figure 4(a) is called a bipolar junctiontransistor (BJT). Figure 4(b) shows a piecewise linear model for the device, in which theparameter 3 is a constant. WheniB > 0andUCEUBE -0.4the emitter diode behaves like a short circuit, the collector diode like an open circuit, andthe collector current is given byic = BiBUnder the above constraints, the BJT is said to operate in its active region. For the rest ofthis exercise, assume that 3 = 100.B iBVBE(a)iEE+VCEBiB0.4 VVBEBiBVCE+0.6 VEE(b)Figure 4: (a) A bipolar junction transistor. B stands for base, E for emitter and C forcollector. (b) A piecewise linear model for the BJTa) Determine the collector current ic for a base current i = 1μA and vCE = 2Vusing the model in Figure 4(b).b) Sketch a graph of ic versus UCE for iB = 1μA. using the model in Figure 4(b). Indrawing this graph, assume that the current source turns off forVCEUBE- 0.4

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Answered: Exercise 4 The three terminal device…

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