Re: SiGe Process VS CMOS
By my personal experience, you'll really appreciate the high gm of
Sige HBT, high current capability so that reduce the parasistic in the
same current requirement. You may often need degenerated resistor
to help the linearity, current mirror matching, lower the noise current.
In LNA design, due to the higher gm, the noise should be smaller inherently.
And, lower LO power requirement for switching function in Mixer. In PA design,
SiGe provide higher power effency due to higher gain.