Published:2009/7/17 4:46:00 Author:Jessie | From:SeekIC
This circuit uses two sections of an LM3900 to form a precision comparator. The current established by VREF at the (-) input of amplifier 1 causes Q1 to adjust VA. The value of VA causes an equal current to flow into the (+) input of amplifier 2. This current corresponds more exactly to the reference current of amplifier 1 National Semiconductor, Linear Applications Handbook 1991 p 244.
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/Norton_precision_comparator.html
Print this Page | Comments | Reading(3)
Code: