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Groups > sci.electronics.design > #469593
| From | Winfield Hill <hill@rowland.harvard.edu> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Diode Array |
| Date | 2017-07-19 09:07 -0700 |
| Organization | Rowland Institute |
| Message-ID | <oko03402t64@drn.newsguy.com> (permalink) |
| References | <eb0d9703-8f2f-46f0-9e9e-1b833d4bb5bc@googlegroups.com> <05077c77-776c-4a65-961f-6bf8fdb16af8@googlegroups.com> <ccf974ff-c85c-47f7-87bf-7f5dd95f3566@googlegroups.com> |
xmacleod@gmail.com wrote...
>
> Thank you for the comments and suggestions. I made some
> measurements of a diode connected transistor, 2N3904 BC
> shorted, and it provides the low leakage and forward
> voltage characteristics needed. Interestingly, the forward
> voltage characteristics are more like the CA3039 than a
> switching diode. For instance, the forward voltage at
> 0.1 uA is about 400 mV, whereas for a 1N4148 diode, it
> is about 150 mV. Also, the CA3039 diode array has a typical
> reverse breakdown of 5 V, similar to a transistor BE junction.
> Is the CA3039 actually an array of diode connected transistors?
> I will look further in to using matched transistor arrays.
> Any recommendations for devices are welcome.
The high voltage you refer to means the current density
is higher, which means the part is smaller. Small dies
also have lower capacitance. I suppose that's actually
the parameter you're concerned with? Working at high
wold normally imply approaching distortion.
--
Thanks,
- Win
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Diode Array xmacleod@gmail.com - 2017-07-18 06:29 -0700
Re: Diode Array John S <Sophi.2@invalid.org> - 2017-07-18 11:24 -0500
Re: Diode Array George Herold <gherold@teachspin.com> - 2017-07-18 09:45 -0700
Re: Diode Array Jeff Liebermann <jeffl@cruzio.com> - 2017-07-18 10:01 -0700
Diode Array pcdhobbs@gmail.com - 2017-07-18 11:17 -0700
Re: Diode Array whit3rd <whit3rd@gmail.com> - 2017-07-18 22:20 -0700
Re: Diode Array xmacleod@gmail.com - 2017-07-19 06:05 -0700
Re: Diode Array George Herold <gherold@teachspin.com> - 2017-07-19 06:22 -0700
Re: Diode Array Winfield Hill <hill@rowland.harvard.edu> - 2017-07-19 09:07 -0700
Re: Diode Array Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-07-19 21:12 +0300
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