AVLSI lecture 25 covers the following topics: 1. Revisit current mirrors 2. Objective of reference sources 3. Current mirror biasing using an ideal current source 4. Current mirror biasing using a resistor 5. Concept of supply independent biasing 6. Supply Independent Biasing (Circuit diagram + working + Analysis) 7. Improved supply independent biasing (Version 1) 8. Improved supply independent biasing (Version 2) @InderjitSingh87