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2 cards from this section. Quick, good the night before a test.
What is the main advantage of using an active load in amplifiers?
Think about what happens to voltage gain with resistance.
Define Beta (β) in the context of transistors.
It reflects the amplification capacity of a transistor.
What value of Beta (β) indicates a high current gain for a transistor?
Consider typical Beta values for various types of transistors.
True or False: Active loads can provide greater voltage gain than passive loads.
Recap on the definitions of what constitutes active vs passive.
If you are designing a CE amplifier with an active load and need a collector current of 5mA with a supply voltage of 15V. Calculate the required Beta if R_B is 1.5MΩ.
Consider knowing V_BE(on) for your transistors.
Given two BJTs in an active load configuration, if their Beta values are 150 and 300 respectively, how would you bias them to achieve equal collector currents of 10mA?
Use the principle of ensuring collector currents are equivalent while adjusting base widths.
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