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uh, that's how the ASM-1 VCA is. So I guess many of us have used that design
successfully.<br>
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mark<br>
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harrybissell wrote:<br>
<blockquote type="cite" cite="mid:3EEBEEF7.79D46039@prodigy.net">
<pre wrap="">This is with the topology where the negative rail of the OTA is varied with<br>the CV. I saw this in a Craig Anderton design (and also in Electronotes as you<br>mentioned)... but I have never tried it.<br><br>It certainly saves having to use a PNP current source to drive the Iabc pin<br>(referenced to the negative rail) but I always wondered if it would affect the<br>headroom.<br><br>So anyone tried this and vouch for it ???<br><br>H^) harry<br><br>Michael Ruberto wrote:<br><br></pre>
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<pre wrap="">I was wondering if it's possible that the op-amps I am using might have too<br>hot an output. in the original schematic Bernie specifies a LF353 and I am<br>using a TL072. could there be enough of a difference in the current sinking<br>ability between these devices to cause the overdrive?<br><br>~M<br><br>_________________________________________________________________<br>MSN 8 with e-mail virus protection service: 2 months FREE*<br><a class="moz-txt-link-freetext" href="http://join.msn.com/?page=features/virus">http://join.msn.com/?page=features/virus</a><br></pre>
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