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<meta name="viewport" content="width=device-width" /><meta http-equiv="Content-Type" content="text/html;charset=utf-8" /></head><body><div class="mail_android_message" style="line-height: 1; padding: 0.5em">If they're from the same die they will be. Hfe and other parameters aren't as well controlled as we'd like them, but they aren't random. <br>
<br>
Justin <br>
</div><div class="mail_android_quote" style="line-height: 1; padding: 0.3em">On 06/07/2016, 9:04 PM Michael E Caloroso <<a href="http://mec.forumreader">mec.forumreader</a>@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0.8ex 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hfe and other parameters can't be controlled during the fabrication<br />
process. There is no way that a series on the same tape will be<br />
matched.<br />
<br />
MC<br />
<br />
On 6/7/16, Pete Hartman <pete.hartman@gmail.com> wrote:<br />
> I haven't noticed, but I haven't done rigorous checking either<br />
> On Jun 7, 2016 4:18 PM, "Mike Beauchamp" <list@mikebeauchamp.com> wrote:<br />
><br />
>> On 06/07/2016 07:12 PM, Pete Hartman wrote:<br />
>><br />
>>> I've found that transistors on a tape almost always have very close<br />
>>> matching between adjacent devices. To the point where I only bother to<br />
>>> check if I have some other reason to want them to be extra precise (e.g.<br />
>>> If I'm building for someone other than myself)<br />
>>><br />
>><br />
>> Did you ever notice any that weren't matched?<br />
>><br />
>> These were just ordered in a loose bag, so maybe the outliers were from a<br />
>> different manufacturing run.<br />
>><br />
>> Mike<br />
>><br />
><br />
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