<div dir="ltr"><div>About TZ </div><div>Curtis suggest it to do TZ with a 3345, jurgen haible did the same with a 3340. Probably SSI VCO TZ works the same.</div><div>Curtis write in this article</div>The one major problem we have observed is internal beatings of the output as heard and seen on an<br>osciIloscope . Theoretically, if the carrier frequency is an even multiple of the modulating frequency, then<br>the new sidebands created will be harmonic. However, we observed that as we increased the modulation<br>depth, these beatings would begin to occur, especially after we passed through zero, Lndicating that the<br>sidebands being produced were becoming non-harmonic .<br>As the depth was increased further, the sound would go through alternate states of beating very rapidly and<br>not beating at all. The trimmer with A1, whose purpose is to trim the absolute value circuit, did not seem to help. Any<br>suggestions from our readers would be very much appreciated.<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Op zo 28 mrt. 2021 om 18:39 schreef Schwarz Raphael <<a href="mailto:raphschwarz@gmail.com" target="_blank">raphschwarz@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto">Hi</div><div dir="auto"><br></div>There is Jürgen Haible implementation of TZFM on the 3340 but it seems it does not work very well. <div dir="auto">It's somewhere in the archive you have to dig it up a bit. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le dim. 28 mars 2021 à 15:05, Mattias Rickardsson <<a href="mailto:mr@analogue.org" rel="noreferrer" target="_blank">mr@analogue.org</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div class="gmail_quote" dir="auto"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">What's a TZ 3340?<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Through-Zero.</div></div></blockquote></div><div dir="auto"><br></div><div dir="auto">... which is a feature of the new SSI2130 VCO, if anyone would need it in a dedicated VCO IC design. :-)</div><div dir="auto"><br></div><div dir="auto">It feels like the CEM3340 "reverse sync" is designed to help the implementation of TZFM, but I can't recall seeing it described. Perhaps it was one of those functions not ending up perfect enough?</div><div dir="auto"><br></div><div dir="auto">/mr</div><div class="gmail_quote" dir="auto"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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