Square/triangle to Saw wave SPIKE!!

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Tony Elliott

Joined May 8, 2015
155
I have made a 0-1V Signal in square/triangle to saw converter. I used a LZX VCO (video oscillator). On high frequencies I get this spike you can see on the oscilloscope image. Is there a way I can remove this spike? It comes from the squarewave going into the 2N3819 FET transistor. Maybe there is a better transistor that can handle the high frequencies? Just a thought....
 

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DarthVolta

Joined Jan 27, 2015
521
I can calulate JFET DC bias for the most part, this weekend I better learn their small signal AC model, which I can probably guess what it is, and give this a go. They are fun, wish I learned them earlier, and MOSFETs.
 
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