wee_liang
Junior Member level 3
Hi,
I'm new to BiCMOS designs (BJT in particular). In CMOS, we choose WL accordingly to obtain the gm we want etc. What about BJT? The main parameter to vary is emitter area, but this only affects Is variable in the Ic equation. What are the considerations is choosing a good size during designs?
What are the side effects if Ic is too high for a small BJT?
Any rules of thumb?
I'm new to BiCMOS designs (BJT in particular). In CMOS, we choose WL accordingly to obtain the gm we want etc. What about BJT? The main parameter to vary is emitter area, but this only affects Is variable in the Ic equation. What are the considerations is choosing a good size during designs?
What are the side effects if Ic is too high for a small BJT?
Any rules of thumb?