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2 cards from this section. Quick, good the night before a test.
What is a current mirror, and why is it used in circuits?
Think about current dependency in circuits.
Explain the role of the K factor in a MOSFET current mirror.
Reflect on how changes affect the output current.
What does a current mirror help maintain in electronic circuits?
Think about the purpose of the current mirror.
True or False: A higher K factor always guarantees better performance in a current mirror.
Consider what else might impact performance.
A current mirror using N-channel MOSFETs has a reference current of 1 mA and a supply voltage of 15V. If K1 = 2 mA/V² and K2 = 8 mA/V², calculate the current output and the minimum voltage for transistor 2.
Don't forget to take the threshold voltage into account.
For a BJT current mirror with beta values of 150, discuss how the output current would vary if the base current loss is significant. How would you mitigate this in a design?
Refer to the concepts we've discussed about current loss.
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