Product role of crystal triode
The transistor has a current amplification effect, which is essentially a triode that can control a large amount of change in the collector current with a small amount of change in the base current. This is the most basic and important feature of a triode. We refer to the ratio of ΔIc/ΔIb as the current amplification factor of the transistor, denoted by the symbol “β”. The current amplification factor is a fixed value for a triode, but the base current changes as the triode operates.