Analog Design Engineer 2 Interview Questions and Answers

Different current mirror configurations include simple, Wilson, cascode, and folded cascode.

• Simple current mirror: easy to design but limited output impedance

• Wilson current mirror: improved output impedance but more complex design

• Cascode current mirror: higher output impedance and better performance at high frequencies

• Folded cascode current mirror: even higher output impedance and improved linearity

• Each configuration has its own advantages and disadvantages depending on the s...read more

2 stage opamps design involves cascading two amplifier stages to achieve desired gain and bandwidth.

• Two amplifier stages are connected in series to achieve higher gain and bandwidth.

• The first stage provides most of the gain while the second stage provides additional gain and output drive capability.

• Each stage can be designed using different amplifier configurations such as common-source, common-emitter, etc.

• Careful consideration must be given to stability, phase margin, and f...read more