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2 cards from this section. Quick, good the night before a test.
Explain what happens at the base-emitter junction during forward bias.
Think about the direction of current flow.
What is the primary role of the collector current?
Relate it to the amplification function of the BJT.
What is the effect of forward bias on the base-emitter junction?
Think about the way voltage affects current in a circuit.
True or False: The collector current is always less than the base current.
Recall the relationship between collector and emitter currents.
A BJT has a base width of 0.7μm and the emitter doping concentration is 10^20cm^(-3). Calculate the theoretical maximum value of β if the base doping is 10^15cm^(-3).
Examine the ratios and dependencies in the provided equations.
In a practical circuit, a transistor's collector current is measured as 2mA, with a base current of 20µA. Calculate the β and explain what it signifies for the transistor's performance.
Substitute values correctly to derive β.
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