Practice Simple Bjt Current Mirror Calculations (11.3) - Design and Characterization of Oscillators and Current Mirrors
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Simple BJT Current Mirror Calculations

Practice - Simple BJT Current Mirror Calculations

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is the purpose of a current mirror?

💡 Hint: Think about its role in circuit design.

Question 2 Easy

What does IREF represent in a current mirror?

💡 Hint: Consider the currents flowing in the circuit.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the role of the reference resistor in a BJT current mirror?

To limit current
To set IREF
To increase output voltage

💡 Hint: Consider what defines the 'start' of the current mirror process.

Question 2

True or False: The Early effect can lead to variations in output current in a current mirror.

True
False

💡 Hint: Reflect on how voltage can influence current characteristics in BJTs.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design a BJT current mirror for an application requiring IREF = 5 mA. Calculate the values for RREF if VCC = 12V and assume VBE = 0.7V.

💡 Hint: Remember to use the standard VBE when calculating RREF.

Challenge 2 Hard

Describe how the base current error will affect IOUT when IREF is set at 3 mA with base currents of 0.02 mA. Calculate IOUT.

💡 Hint: Make sure to account for the error by factoring in the base currents.

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Reference links

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