May 28, 2015 #1 M mashinga Newbie Joined May 25, 2015 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 16 Hello guys, I've set output of LEM between -1 V and +1V. I need to shift negative voltage to at least 0V. How can i do it? Could you give me an idea?
Hello guys, I've set output of LEM between -1 V and +1V. I need to shift negative voltage to at least 0V. How can i do it? Could you give me an idea?
May 28, 2015 #2 schmitt trigger Advanced Member level 5 Joined Apr 17, 2013 Messages 2,725 Helped 859 Reputation 1,722 Reaction score 850 Trophy points 1,393 Activity points 18,445 If I understand you correctly, you want to shift a voltage swing of -1<V<+1 to 0<V<2 ? You can use the superposition principle.
If I understand you correctly, you want to shift a voltage swing of -1<V<+1 to 0<V<2 ? You can use the superposition principle.
May 28, 2015 #3 B BradtheRad Super Moderator Staff member Joined Apr 1, 2011 Messages 15,187 Helped 2,900 Reputation 5,812 Reaction score 2,982 Trophy points 1,393 Location Minneapolis, Minnesota, USA Activity points 113,782 Can you tap into a positive voltage supply? Then you might be able to adapt this simple level shifter:
Can you tap into a positive voltage supply? Then you might be able to adapt this simple level shifter:
May 28, 2015 #4 schmitt trigger Advanced Member level 5 Joined Apr 17, 2013 Messages 2,725 Helped 859 Reputation 1,722 Reaction score 850 Trophy points 1,393 Activity points 18,445 What Brad is showing is exactly the superposition principle. On your bipolar waveform you superimpose a fixed DC bias
What Brad is showing is exactly the superposition principle. On your bipolar waveform you superimpose a fixed DC bias
May 28, 2015 #5 M mtwieg Advanced Member level 6 Joined Jan 20, 2011 Messages 3,835 Helped 1,310 Reputation 2,626 Reaction score 1,405 Trophy points 1,393 Activity points 29,370 mashinga said: Hello guys, I've set output of LEM between -1 V and +1V. I need to shift negative voltage to at least 0V. How can i do it? Could you give me an idea? Click to expand... It has a current output, so you can do this by connecting the load resistor Rm to a positive bias voltage (like 1V) instead of to ground.
mashinga said: Hello guys, I've set output of LEM between -1 V and +1V. I need to shift negative voltage to at least 0V. How can i do it? Could you give me an idea? Click to expand... It has a current output, so you can do this by connecting the load resistor Rm to a positive bias voltage (like 1V) instead of to ground.
Jun 3, 2015 #6 M mashinga Newbie Joined May 25, 2015 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 16 Thanks for replies guys. They are really useful.