#### jacobliu

##### Newbie level 5

**area bjt simulation hspice**

Hi,

In hspice BJT simulation, there is a parameter "AREA".

Here is the description of this parameter in hspice manual:

Emitter area multiplying factor which affects currents,

resistances and capacitances. Default = 1.0.

&

The AREA parameter, the normalized emitter area, divides all resistors and

multiplies all currents and capacitors.

I have a vertical BJT spice model, the emitter area is 5*5, the base area is 11*11.

What is the value should i use in hspice simulation?

or,it is not a critical parameter in bandgap reference simulation?

Regards,