PRECISION，FAST_SETTLING，LOW_PASS_FILTER

Published:2009/7/2 3:02:00 Author:May | From:SeekIC

This circuit is useful where fast signal acquisition and high precision are required, as in electronic scales. The filter's time constant is set by the 2 K ohm resistor and the 1 μF capacitor until comparator No, 1 switches. The time constant is then set by the 1.5 M ohm resistor and the 1 μF capacitor. Comparator No. 2 provides a quick reset.The circuit settles to a final value three times as fast as a simple 1.5 M ohm-1μF filter, with almost no dc error.



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