The frequency at which the grounded gate current gain has decreased to 0.7 of that obtainable at 1 kHz 

The frequency at which the grounded collector current gain has decreased to 0.7 of that obtainable at 1 kHz

The frequency at which the grounded emitter current gain has decreased to 0.7 of that obtainable at 1 kHz

The frequency at which the grounded base current gain has decreased to 0.7 of that obtainable at 1 kHz



2