bandgap reference - voltage reference - voltage source - start-up circuit

This video talks about Bandgap reference. Voltage references, independent from temperature, process and supply are very important in electronics. The bandgap reference is a good way to produce voltage references with a very little temperature dependence and therefore also a very little process dependence. Wilson current mirror:    • Wilson Current Mirror   Bibliography : Design of Analog CMOS Integrated Circuits by Behzad Razavi