>p.s.
>The reason for my question is that I want to see this circle when connecting
>sine and cosine in scope x-y mode, just curious to see it.

Agree!  That was me, 30 years ago after I got my first 'scope.  And...there 
was a magazine article where they took some zener diodes, and clipped the 
waveforms...and made a square!  I just HAD to try that one.

Barry



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