363 The zener diode of Fig 347 is connected to the circuit o

3.63 The zener diode of Fig. 3.47 is connected to the circuit of Fig. P3.21 in such a direction that it becomes reverse-biased (diode arrow pointing up). With the com- reverse-biased (diode arrow pointing up). With the com- ponent values shown in Fig. P3.21, the zener will not bem reverse breakdown. How large must Vs become before reverse breakdown occurs? 47is connec nnnected to the

Solution

when Vth=5.6v then zener diode gets saturated

So the largest value of Vx= 5.6v

(Vb not given so treated as Vx)