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<p>feedback around <a href="page.php?w=operational_amplifiers">operational amplifiers</a> is used to generate <a href="page.php?w=mathematical_functions">mathematical functions</a> such as <a href="page.php?w=addition">addition</a>, <a href="page.php?w=subtraction">subtraction</a>, <a href="page.php?w=Integral">integration</a>, <a href="page.php?w=Derivative">differentiation</a>, <a href="page.php?w=logarithm">logarithm</a>, and <a href="page.php?w=antilog">antilog</a> functions.<br/>
* In <a href="page.php?w=Delta-sigma_modulation">delta-sigma</a> <a href="page.php?w=Analog-to-digital_converter">analog-to-digital</a></p><p>
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