Comparator_for_signals_of_opposite_polarity

Published:2009/7/24 4:25:00 Author:Jessie | From:SeekIC

Fig. 15-11 In this circuit, R1 and R2 isolate the two signal sources. Often, such resistors must be relatively large so that the signal sources are not loaded (when fed directly to a comparator). As a result, the input current of the comparator must be reduced to prevent inaccuracies. The problem is eliminated with a buffer because the input current to the LM106 has no effect on the current through R1 and R2. National Semiconductor, Linear Applications Handbook. 1991, p. 1990.



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