# Electrical – Has the emitter resistor any effect in calculating the base current in a common emitter amplifier

amplifiercommon-emitter

It's generally the first step to calculate the collector resistor Rc, according to the operating collector current Ic and collector-emitter voltage Vce required.

Rc = Vce / Ic

or

Rc = Vcc / Ic(max)
both result the same for a Class A amplifier.

In the "hyperphysics" example however it is said that "The resistance Rc+Re determines the maximum collector current…" and

Rc + Re = Vcc / Ic(max).

http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/npnce3.html#c1

I find this site to be a very informative and credible one, so it makes me doubt.

Ic = \$\dfrac{Vcc}{R_E+R_C}\$