What must the relationship of re to r1 and r2 be


Response to the following problem:

For the circuit in Fig. , assuming all transistors to be identical with β infinite, derive an expression for the output current IO, and show that by selecting

50_circuit.jpg

and keeping the current in each junction the same, the current IO  will be Io=Vcc/2RE

which is independent of VBE. What must the relationship of RE to R1 and R2 be? For VCC =10 V and VBE =0.7 V, design the circuit to obtain an output current of 0.5 mA. What is the lowest voltage that can be applied to the collector of Q3:

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Electrical Engineering: What must the relationship of re to r1 and r2 be
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