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4 cards from this section. Quick, good the night before a test.
What is the primary function of a current mirror?
Think about why we might need constant current in circuits.
Define a BJT.
What types of charge carriers does a BJT use?
What is the role of β in a BJT?
Think about how much the base current controls the collector current.
True or False: A beta-helper circuit aims to decrease the current output of a current mirror.
Remember the purpose of adding extra components in circuit designs.
Design a BJT current mirror to achieve a mirrored output of 3 mA. Given the supply voltage of 12V and characteristics of the BJTs used, explain how you would select the resistor value to achieve this.
Think about the relationship between voltage, current, and resistance, and how those affect your mirrored output.
Calculate the impact of early voltage on a current mirror where V_EA is 100V. How would this affect the output current when varying the load?
Consider early voltage as part of your equation and analyze how current mirrors behave under changing conditions.
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