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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the primary function of a current mirror?
💡 Hint: Think about why we might need constant current in circuits.
Question 2
Easy
Define a BJT.
💡 Hint: What types of charge carriers does a BJT use?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the role of β in a BJT?
- A measure of the transistor's temperature
- A measure of current gain
- A measure of input impedance
💡 Hint: Think about how much the base current controls the collector current.
Question 2
True or False: A beta-helper circuit aims to decrease the current output of a current mirror.
- True
- False
💡 Hint: Remember the purpose of adding extra components in circuit designs.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
💡 Hint: Think about the relationship between voltage, current, and resistance, and how those affect your mirrored output.
Question 2
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?
💡 Hint: Consider early voltage as part of your equation and analyze how current mirrors behave under changing conditions.
Challenge and get performance evaluation