Applications of the LM392 Comparator OpAmp IC: National Semiconductor Application Notes, 04-Nov-1995 

Comparing the High Speed Comparators: National Semiconductor Application Notes, 24-Jan-1999 

Fast Voltage Comparators with Low Input Current: National Semiconductor Application Notes, 28-Jun-1996 

LM139 / LM239 / LM339 a Quad of Independently Functioning Comparators: National Semiconductor Application Notes, 24-Jan-1999 

Microvolt Comparator: National Semiconductor Application Notes first published 28-Jun-1996/ (added 3/’03)

Precision IC Comparator Runs from Plus 5V Logic Supply: National Semiconductor Application Notes first published 04-Nov-1995

Voltage Comparator Switch: