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class="messageicon">										<img src="data:image/gif;base64,R0lGODlhFAAUAMQUAKex1Jqjxba5u8bKzb7FyYGIjOPr79Tb3293fVJdgba9waCt0aaxw7K/4q65y/r9/1hXV8vY/FxiZvT7/wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAUABQAAAWLICWOZGmWkiRC0GlKwyBBANC6onRMkxxFgAROx+P5gDfU7vEoHm3KycPRdEp+UFEBIXXwqFbsrWBAVMFS4xVJIU8QBirTWzysGxAyQsFgTuhFAmsBeXsGfoA8gj+EOQRFiROLEQFCIxKPVYGDSZePRZKDli+foYydpKELlKgnEoIUEI04JCortLgnIQA7" alt="" data-pagespeed-url-hash="2328624801" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"/>									</div>									<h5 id="subject_3214222">										<a href="https://www.eevblog.com/forum/projects/led-as-a-zener-temperature-coeficient/msg3214222/?PHPSESSID=io6aqrvckogk5je6vdkj4j7mt2#msg3214222" rel="nofollow">LED as a zener, temperature coeficient</a>									</h5>									<div class="smalltext">&#171; <strong> on:</strong> <strong>Yesterday</strong> at 09:35:22 pm &#187;</div>									<div id="msg_3214222_quick_mod"></div>								</div>							</div>							<div class="post">								<div class="inner" id="msg_3214222">I&#039;ve used LED for years as a convenient way to offset voltage and provide status at the same time. A while back there a really good thread about just how stable they were with temperature.&nbsp; I&#039;ve searched and searched a variety of terms and have been unable to locate it. Did anyone bookmark this?&nbsp; I&#039;m looking to compare the TC of LED vs a standard diode.</div>							</div>						</div>						<div class="moderatorbar">							<div class="smalltext modified" id="modified_3214222">							</div>							<div class="smalltext reportlinks">								<img src="data:image/gif;base64,R0lGODlhEAAQAKIEADMzMwAAAP8zADMKAP///wAAAAAAAAAAACH5BAEAAAQALAAAAAAQABAAQAMxSLrcDlAMFZyCQNq96gIExl0hlgWoR4qNOlJpCb5yWD/Qp+FzuLsiEAuYs7heR5oiAQA7" alt="" data-pagespeed-url-hash="2579805057" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"/>								Logged							</div><span id="thank_you_placeholder_3214222" class="thank_you_hidden">&nbsp;</span>						</div>					</div>					<span class="botslice"><span></span></span>				</div>				<hr class="post_separator"/>				<a id="msg3214250"></a>				<div class="windowbg2">					<span class="topslice"><span></span></span>					<div class="post_wrapper">						<div class="poster">							<h4>								<img 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id="msg_3214250_quick_mod"></div>								</div>							</div>							<div class="post">								<div class="inner" id="msg_3214250">Somewhere I have seen a table of -millivolt/C temperature coefficients for different LED processes.&nbsp; Some of them are a good match for the -2 millivolt/C of a forward biased silicon diode or base-emitter junction making them a convenient way to build temperature compensated current sources.<br/></div>							</div>						</div>						<div class="moderatorbar">							<div class="smalltext modified" id="modified_3214250">							</div>							<div class="smalltext reportlinks">								<img src="data:image/gif;base64,R0lGODlhEAAQAKIEADMzMwAAAP8zADMKAP///wAAAAAAAAAAACH5BAEAAAQALAAAAAAQABAAQAMxSLrcDlAMFZyCQNq96gIExl0hlgWoR4qNOlJpCb5yWD/Qp+FzuLsiEAuYs7heR5oiAQA7" alt="" data-pagespeed-url-hash="2579805057" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"/>								Logged							</div><span id="thank_you_placeholder_3214250" 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href="https://www.eevblog.com/forum/projects/led-as-a-zener-temperature-coeficient/msg3214268/?PHPSESSID=io6aqrvckogk5je6vdkj4j7mt2#msg3214268" rel="nofollow">Re: LED as a zener, temperature coeficient</a>									</h5>									<div class="smalltext">&#171; <strong>Reply #2 on:</strong> <strong>Yesterday</strong> at 10:15:51 pm &#187;</div>									<div id="msg_3214268_quick_mod"></div>								</div>							</div>							<div class="post">								<div class="inner" id="msg_3214268">In his book:<br/><a href="https://books.google.ca/books/about/Current_Sources_and_Voltage_References.html?id=03JmxpE39N4C&amp;printsec=frontcover&amp;source=kp_read_button&amp;redir_e;sc=y#v=onepage&amp;q&amp;f=true" class="bbc_link" target="_blank">https://books.google.ca/books/about/Current_Sources_and_Voltage_References.html?id=03JmxpE39N4C&amp;printsec=frontcover&amp;source=kp_read_button&amp;redir_esc=y#v=onepage&amp;q&amp;f=true</a><br/>page 118&nbsp; Linden T. Harrison gives some numbers</div>							</div>						</div>						<div class="moderatorbar">							<div class="smalltext modified" id="modified_3214268">							</div>							<div class="smalltext reportlinks">								<img src="data:image/gif;base64,R0lGODlhEAAQAKIEADMzMwAAAP8zADMKAP///wAAAAAAAAAAACH5BAEAAAQALAAAAAAQABAAQAMxSLrcDlAMFZyCQNq96gIExl0hlgWoR4qNOlJpCb5yWD/Qp+FzuLsiEAuYs7heR5oiAQA7" alt="" data-pagespeed-url-hash="2579805057" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"/>								Logged							</div><span id="thank_you_placeholder_3214268" class="thank_you_hidden">&nbsp;</span>						</div>					</div>					<span class="botslice"><span></span></span>				</div>				<hr class="post_separator"/>				</form>			</div>			<a id="lastPost"></a>			<div class="pagesection">						<div class="buttonlist floatright">			<ul>				<li><a class="button_strip_print" 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