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<span style="font-size:14.0pt;font-family:"Arial",sans-serif;mso-fareast-font-family:"Times New Roman";color:black">CheaterCheater asked:<o:p> </o:p></span></p>
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<span style="font-size:14.0pt;font-family:"Arial",sans-serif;mso-fareast-font-family:"Times New Roman";color:black">“Really interesting - why does the DC shift happen?”<o:p> </o:p></span></p>
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<span style="font-size:14.0pt;font-family:"Arial",sans-serif;mso-fareast-font-family:"Times New Roman";color:black"><o:p> </o:p></span></p>
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<span style="font-size:14.0pt;font-family:"Arial",sans-serif;mso-fareast-font-family:"Times New Roman";color:black">Orin Replied correctly:<o:p> </o:p></span></p>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black">“Asymmetric high frequency MHz oscillations can appear as "DC" offsets - sorta like low pass filtered PWM.”<o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black">Bernie adds:<o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black">Making a good sinewave oscillator (directly - not waveshaped) is skilled engineering.<span style="mso-spacerun:yes">  </span>Spurious oscillations are generally “accidental” and full of harmonic, including harmonic zero (DC). If I recall correctly, this one looked like a sequence of inverted U’s.<o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></pre>
<pre style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></pre>
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