this page:
The common-base amplifier
is wrong.
That is a common emmitter (well, common emmiter with a degeneration resistor) amplifier.
In particular, this statement : "It is called the common-base configuration because (DC power source aside), the signal source and the load share the base of the transistor as a common connection point" is very incorrect.
A common base amplifier has the input to the amplifier going into the emiiter, and the output comes out from the collector.
The base is "common" to ground - usually at some DC voltage with a bypass cap to ground so that it's an AC ground.
Wikipedia's Common Base for reference
The common-base amplifier
is wrong.
That is a common emmitter (well, common emmiter with a degeneration resistor) amplifier.
In particular, this statement : "It is called the common-base configuration because (DC power source aside), the signal source and the load share the base of the transistor as a common connection point" is very incorrect.
A common base amplifier has the input to the amplifier going into the emiiter, and the output comes out from the collector.
The base is "common" to ground - usually at some DC voltage with a bypass cap to ground so that it's an AC ground.
Wikipedia's Common Base for reference