Bipolar Junction Transistor
Base current flows from Base to Emitter.
In an NPN the Base is negatively biased relative to the Emitter.
In a PNP the Base is positively biased relative to the Emitter.
Base current flows from Base to Emitter.
In an NPN the Base is negatively biased relative to the Emitter.
In a PNP the Base is positively biased relative to the Emitter.