conductivity modulation meaning

[Electronics]
In a semiconductor, the variation in conductivity that results from a variation of charge-carrier density.

Examples

1. conductivity modulation transistor
2. conductivity modulation effect
3. Because the base region is very lightly doped, the additional current ( actually charges in the base region ) causes conductivity modulation which reduces the resistance of the portion of the base between the emitter junction and the B2 terminal.