3.3.2. Current Mirror (Active Load)

Try these first

1. 1.

   What is the primary function of a current mirror in CMOS circuits?

   Hint

   Think about how current flow is controlled.

2. 2.

   Which type of transistor is typically used in a current mirror?

   Hint

   Consider which transistors are more effective in this context.

3. 3.

   What is the role of a current mirror in an operational amplifier?

   • To amplify voltage
   • To mirror current
   • To reduce power consumption

   Hint

   Think about current management within circuits.

4. 4.

   True or False: Current mirrors only use NMOS transistors in their construction.

   • True
   • False

   Hint

   Consider what type of transistors are effective for current mirroring.

5. 5.

   Design a current mirror circuit to provide a constant current of 100 µA. Detail your component selections and calculations.

   Hint

   Focus on transistors that can handle the required current while keeping effects of temperature in mind.

6. 6.

   Evaluate how the performance of a current mirror would change if one PMOS transistor is replaced with an NMOS transistor under similar conditions.

   Hint

   Think about how each type of transistor functions under current control.