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2 cards from this section. Quick, good the night before a test.
What is a current mirror?
Think about circuits that keep a current constant.
Define the term lambda effect.
It relates to the output characteristics of a MOSFET.
What is the primary function of a current mirror?
Think of what a mirror does.
The lambda effect relates to which type of transistor?
Consider which transistor type changes based on voltage.
For a precision current mirror configured with BJTs and an early voltage of 100V, calculate the expected output current if the reference current is 0.5 mA and the beta values for the transistors are 150 and 75.
Factor the beta changes when calculating the output.
Derive the relationship between output resistance and the lambda effect in MOSFET current mirrors under circuit voltage variations.
Use linear approximations to understand how changes in V affect I.
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