Original sentence: In MOSFET technology especially, cascoding can be used in current mirrors to create relatively "constant" current sources with high output impedances.With the rise of integrated circuits, transistors have become "cheap" in terms of silicon die area
Edited sentence: In MOSFET technology especially, cascoding can be used in current mirrors is increase the output impedance of the output current source.With the rise of integrated circuits, transistors have become cheap in terms of silicon die area