ECE315_cascode&mirrors

In a bipolar cascode stage, what is the maximum output impedance primarily limited by?

• Collector current

• Emitter resistance

• Base current

• rπ between emitter and ground

What is the primary advantage of using a cascode amplifier?

• Reduced size

• Simpler design

• Higher output impedance

• Lower power consumption

What is the typical output impedance of a bipolar cascode compared to a CE stage?

• Lower

• Equal

• Higher

• Unpredictable

The output resistance of a cascode amplifier is given by:

• rout=ro1

• rout​=ro1​+ro2​

• rout​=ro1​∥ro2​

• rout=ro1(1+gm2ro2)

What is the primary purpose of a current mirror?

• To reduce noise

• To increase power supply

• To sense and duplicate current

• To amplify voltage