lord loh.
Member
Okay... Replying to the original post,
I believe that the emitter of a (NPN) transistor puts up the same voltage as that what is supplied to the base (with a small drop). Consider it as a PN Junction diode.
The current that is available at the emitter is that that is coming from the collector as the base current is very small - few microAmpers.
The zener and the resistor forms a potential divider to give a constant stable voltage to the transistor base irrespective of the change in input voltage..
I believe that the emitter of a (NPN) transistor puts up the same voltage as that what is supplied to the base (with a small drop). Consider it as a PN Junction diode.
The current that is available at the emitter is that that is coming from the collector as the base current is very small - few microAmpers.
The zener and the resistor forms a potential divider to give a constant stable voltage to the transistor base irrespective of the change in input voltage..