https://the-analog-thing.org/w/index.php?action=history&feed=atom&title=MultiplierMultiplier - Revision history2026-10-10T20:34:45ZRevision history for this page on the wikiMediaWiki 1.43.8https://the-analog-thing.org/w/index.php?title=Multiplier&diff=558&oldid=prevTimStinchcombe: minor spelling2021-09-19T17:58:41Z<p>minor spelling</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:58, 19 September 2021</td>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The '''Multiplier''' is an analog computing element which is capable of performing the multiplication of two quantities <code>X * Y = OUT</code>. We call <code>X</code> and <code>Y</code> the ''factors'' and <code>OUT</code> the ''product''. [[The Analog Thing]] has two multipliers, which means you can do two multiplications in a single circuit. However, alternatives exist: If you only want to <del style="font-weight: bold; text-decoration: none;">multiplicate with </del>a constant, use a [[Coefficient/Potentiometer]].</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The '''Multiplier''' is an analog computing element which is capable of performing the multiplication of two quantities <code>X * Y = OUT</code>. We call <code>X</code> and <code>Y</code> the ''factors'' and <code>OUT</code> the ''product''. [[The Analog Thing]] has two multipliers, which means you can do two multiplications in a single circuit. However, alternatives exist: If you only want to <ins style="font-weight: bold; text-decoration: none;">multiply by </ins>a constant, use a [[Coefficient/Potentiometer]].</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Multiplication in electrical analog computers is one of the hardest basic arithmetic operations, since there is no fundamental process in nature which could be exploited. The THAT features a four quadrant multiplier (Gilbert cell) which is by far the most expensive part of the <del style="font-weight: bold; text-decoration: none;">overal </del>board. This is the reason why there are only two multipliers on the overall board. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Multiplication in electrical analog computers is one of the hardest basic arithmetic operations, since there is no fundamental process in nature which could be exploited. The THAT features a four quadrant multiplier (Gilbert cell) which is by far the most expensive part of the <ins style="font-weight: bold; text-decoration: none;">overall </ins>board. This is the reason why there are only two multipliers on the overall board. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Usage of the Multiplier ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Usage of the Multiplier ==</div></td></tr>
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</table>TimStinchcombehttps://the-analog-thing.org/w/index.php?title=Multiplier&diff=201&oldid=prevSven: Created page with "The '''Multiplier''' is an analog computing element which is capable of performing the multiplication of two quantities <code>X * Y = OUT</code>. We call <code>X</code> and <c..."2021-07-24T00:19:24Z<p>Created page with "The '''Multiplier''' is an analog computing element which is capable of performing the multiplication of two quantities <code>X * Y = OUT</code>. We call <code>X</code> and <c..."</p>
<p><b>New page</b></p><div>The '''Multiplier''' is an analog computing element which is capable of performing the multiplication of two quantities <code>X * Y = OUT</code>. We call <code>X</code> and <code>Y</code> the ''factors'' and <code>OUT</code> the ''product''. [[The Analog Thing]] has two multipliers, which means you can do two multiplications in a single circuit. However, alternatives exist: If you only want to multiplicate with a constant, use a [[Coefficient/Potentiometer]].<br />
<br />
Multiplication in electrical analog computers is one of the hardest basic arithmetic operations, since there is no fundamental process in nature which could be exploited. The THAT features a four quadrant multiplier (Gilbert cell) which is by far the most expensive part of the overal board. This is the reason why there are only two multipliers on the overall board. <br />
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== Usage of the Multiplier ==<br />
[[File:Multipliers.png|thumb|The picture shows ''two distinct'' multipliers, one per row]]<br />
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* Choose one multiplier which is free. Each row is a single multiplier.<br />
* Connect something to the inputs (round circles <code>X</code> and <code>Y</code>). Only connect a single jack, do not stack jacks.<br />
* Use the output (triangular circuit), you can connect multiple jacks if you want.<br />
<br />
Interestingly, the multiplication can never produce an overload. This is easy to see: If <code>-1 < X < 1</code> and <code>-1 < Y < 1</code>, then <code>0 < Z < 1</code>.<br />
<br />
== Chip ==<br />
In [[The Analog Thing]], the ''AD633JR'' is used for multiplication. You can find it in the schematics for instance in [[:File:Anathing_v1.0_base_4.pdf]].<br />
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[[Category:Components of The Analog Thing]]</div>Sven