Mornsun, Flexxon, HK Crystal

https://www.nacsemi.com/

Mornsun, Flexxon, HK Crystal, Jianghai

https://www.worldmicro.com/

Mornsun

https://www.digikey.com/

Southwest Microwave

www.hasco-inc.com

Mornsun, Flexxon

www.edgeelectronics.com

https://go.okstate.edu/undergraduate-academics/majors/electrical-engineering-technology.html