comparison of vlsi technologies
•Bipolar
– Workhorse of “old” analog
– Available from a handful of vendors
– Speed/ power advantage over CMOS
(diminishing)
– Low integration density
•Standard C MOS
– Suitable for most analog designs
– Best for combining analog and
digital
– Highest integration density
– Widely available
– Short life cycle (3 years/ generation)
•BiCMOS
– Complex process, viability uncertain
• Silicon on insulator (SOI)
– Modest speed advantage for digital
– Drawbacks for analog
•SiGe
– Complexity equivalent to BiCMOS
– Extremely fast bipolar device plus
submicorn CMOS
– Availability increasing
•GaAs
– Unsuitable for wideband analog