MICROVOLT_COMPARATOR

Published:2009/6/28 23:42:00 Author:May | From:SeekIC

Combination of National LM121A preamp and LM111 comparator serves for comparing DC signal levels that are only within microvolts of each other. With bias network shown, preamp has open-loop temperature-stable voltage gain close to 100.Separation of preamp from comparator chip minimizes effects of temperature variations.Circuit hysteresis is 5 μV, which under certain conditions can be trimmed to 1 μV.— Linear Applications, Vol. 2, National Semiconductor, Santa Clara, CA, 1976, LB-32.



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