VISUAL_LEVEL_INDICATOR

Published:2009/7/7 8:05:00 Author:May | From:SeekIC

This indicator is basically a switch with hysteresis characteristics. If the input voltage momentarily (or permanently) exceeds the most positive refer-ence level, LED1 is switched on. If, on the other hand, the voltage falls below the negative, or least positive, reference level, LED1 will be switched off and LED2 switched on. The output voltage, VO is clamped either to the diode voltage VD1 , orVD2 depending on which LED is conducting. ForVO to be positive, VB has to be positive with respect to the reference voltage VR; for VO to be negative, VB has to be negative with respect to VR.



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