Current Detection Circuit Diagram made up of LM311 and Others

Published:2011/5/20 22:42:00 Author:leo | Keyword: Current Detection Circuit Diagram made up of LM311 and Others, LM311 | From:SeekIC

As what is shown in the picture, this is a current detection circuit diagram which is made up of LM311 and others. In this circuit, when the input control signal of the screen grid VT1 is in high level, it will use VT1 as the current detector. When the armature of DC electro-motor is turning, the commutator lug of brush shorts suddenly, which generates current pulses. The current pulses come through RDS of VT1 and are changed to voltage signals. Then the voltage signals are AC-coupled when passing through capacitor C1 and reach non inverting input port of comparison unit. C2 is used as filter which can make A1 output smooth wave shape that can be used in combination with pin 5 and pin6 to sharp the edge outputted by clock.



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