Depending on your budget and your customer requirements you may find that
a professionally developed instrumentation amplifier is best for this kind of thing.
There are many vendors out there. I recommend that you choose one from a
well known manufacturer such as Hewlet Packard, Tektronix etc. Developing a
temperature compenstated, high common mode rejection, high precission,
low noise, high gain amplifier for high precission measurementsis a big task.
Espicially if you are delivering data to a customer that requires traceability to a
national or international standard. Some vendors will calibrate the amplifier for
you and provide the traceability paper work upon request. more $$
If your customer does not require the traceability then you could build your own.
There are several vendors that supply instrumentation amplifiers. I would look at
Burr-Brown, National, Maxim, Siliconix, Motorola, and Texas Instruments if you
are planning on building your own from scratch. Compare the specifications and
choose the one that best fits your application, price, and availability. They also
have some helpful application notes to help you avoid some of the pitfalls of
designing your own amplifier circuit.
There are A/D computer boards out there that have built in amplifiers as well.
The ones I seen usually have a maximum gain of 1000.
Without more information I can not be more specific but I hope this helps.
Rich
> ----------
> From: ahgu[SMTP:[EMAIL PROTECTED]]
> Reply To: ahgu
> Sent: Thursday, October 07, 1999 12:47 PM
> To: RtLinuX (rtl)
> Subject: [rtl] how to amplify the signal from the detector?
>
> Wonder if anyone encountered the signal amplification problem. My detector
> give out slow-varying DC signal in couple mV range. My A/D board reads 0-5V
> and I need all the 16bit resolution. Where would I get a DC amplifier to
> solve this problem? Please give me some insight on this problem.
>
> Thanks
> Andrew
>
>
>
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