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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the main purpose of a BJT current mirror?
💡 Hint: Think about how current mirrors are utilized in amplifiers.
Question 2
Easy
What does I_ref stand for?
💡 Hint: Consider what current is defined before being mirrored.
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 primary role of Q1 in the BJT current mirror?
- Sets the output current
- Establishes the reference current
- Mirrors the current
💡 Hint: Consider what happens in the diode connection of the circuit.
Question 2
True or False: The output current from a BJT current mirror is always equal to the reference current.
- True
- False
💡 Hint: Remember, things don't always go as expected in electronics.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a basic BJT current mirror for an output current of 2 mA using a reference current of 1 mA. What base resistive element would you need if powered by a 5V supply, with V_BE = 0.7V?
💡 Hint: Consider the voltage drop across the reference transistor and its required current.
Question 2
How would you expect the output current of a BJT current mirror to behave if the temperature increases significantly?
💡 Hint: Think about how temperature affects both the transistors and their operating points.
Challenge and get performance evaluation