[time-nuts] adjustable gain/offset amplifiers

Chad Simpson analogaficionado at gmail.com
Sat Jul 25 05:05:54 UTC 2009


Hi Jim,

Take a look at the LeCroy DA1855A...  I think that might be just what you
need.  100MHz BW, precision offset generator, gain settings up to 10x (or is
it 100x? ...  been a while since I've used one).  You'll need 1x probes to
get the max gain though.

- Chad.


On Fri, Jul 24, 2009 at 11:03 AM, Lux, James P (337C) <
james.p.lux at jpl.nasa.gov> wrote:

> I'm looking for some amplifiers with adjustable gain (say from 0 to 5) and
> offset (say +/- 5V) for general benchtop use (e.g. you have some widget you
> want to test as a replacement, but the original device had different input
> ranges, and before you go redesign the rest of the circuit..) with at least
> 10 MHz BW.
>
> SRS has something close (SIM983) but it's only 1 MHz BW..
>
> I'm thinking that someone might have run across it in the nuclear
> instrumentation or experimental physics area? (I looked through the Ortec
> NIM module listing, but nothing lept out).  I've also run across the
> instrumentation amps used for strain gages, but they're all in the few tens
> of kHz range.
>
> I'd like to avoid cobbling up something with some wideband opamps and pots
> (which is what we've done in the past..).
>
>
> James Lux, P.E.
> Task Manager, SOMD Software Defined Radios
> Flight Communications Systems Section
> Jet Propulsion Laboratory
> 4800 Oak Grove Drive, Mail Stop 161-213
> Pasadena, CA, 91109
> +1(818)354-2075 phone
> +1(818)393-6875 fax
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