Small Scale Integration (SSI)
- Normally it has about 20 components.
- The Minuteman missile and Apollo program needed lightweight digital computers for their initially-guided flight comnputers.
- The Apollo guidance computer led and motivated the integrated-circuit technology, while the Minuteman missile forced it into mass-production
Medium Scale Integration (MSI)
- it can have about 00 components.
- Medium Scale Integration came in to industry in late 1969s:
- MSI is the next step in the development of integrated circuits after Small Scale Integration'
- Medium-Scale Integration allowed more complex systems to be produced using smaller circuit boards than in SSI (Small Scale Integration).
Large Scale integration (GSI)
- It have about 4000 components.
- LSI is the process of integrating or embedding thousands of transistors on single silicon semiconductor microchip. LSI technology was conceived in mid-1970s when computer processor microchips were under development
What is VLSI?
-"Very Large Scale Integration
-Defines integration level
-19808 hold-over from outdated taxonomy for integration levels
Obviously influenced from frequency bands, i.e. HF, VHF, UHF
-Sources disagree an what is measured (gates or transistors?)
SS1-Smal-Scale Integration (0-102)
MSI-Medium-Scale Integration (102-103)
LSI-Large-Scale Integration (103-105))
LSI-Very Large-Scale Integration (105 107)
ULSI-Ultra Large-Scale Integration (>= 107)
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