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Old 22nd July 2013, 07:53 PM   #1
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Default Squarewave

Im trying to set a voltage source to give me a square that is +1/-1V. I have got the supply to go from +1 to 0, but I cant work out how to make it negative. Is there some way of adjusting the y axis?
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Old 22nd July 2013, 09:17 PM   #2
DF96 is online now DF96  England
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Let me look into my crystal ball. . . The mist is clearing - there is a sign which says RT*M.

Does that mean anything?
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Old 23rd July 2013, 05:03 AM   #3
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Not to me it does nt.
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Old 23rd July 2013, 06:20 AM   #4
Mooly is offline Mooly  United Kingdom
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You'll have to tell us more about the set up. Do you mean viewed as on a scope or in simulation ?
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Old 23rd July 2013, 07:14 AM   #5
qusp is offline qusp  Australia
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you need a negative supply, or floating center tap/ground reference, to allow a +/- power supply. if you are unable to get a negative swing from a positive supply, thats no surprise
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Old 23rd July 2013, 06:18 PM   #6
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I build an integrator circuit on LT Spice but I cant work out how to make the voltage supply ac.

integrator.png
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Old 23rd July 2013, 06:58 PM   #7
Mooly is offline Mooly  United Kingdom
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This would give 1 volt peak to peak at 1Hz
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Old 25th July 2013, 05:18 AM   #8
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Ah! I see. Thanks guys.
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