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*6.11 For a transistor with a close to unity, show that if a changes by a small per-unit amount (Aala), the corresponding per-unit change in B is given approximately by

\frac{\Delta \beta}{\beta} \simeq \beta\left(\frac{\Delta \alpha}{\alpha}\right) Now, for a transistor whose nominal B is 100, find thepercentage change in its a value corresponding to a drop inits B of 10%. D 6.34 Design the circuit in Fig. VE6.1 to establish Ic=0.5 mA and Vc= 0 V. The transistor exhibits vBEof 0.7 V at ic =1 mA, and B =100

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