Hi The data sheet is A bit easier to find at http://www.interfet.com/datasheet/IF3601/
Bob On Feb 28, 2012, at 6:06 PM, Bill Fuqua <[email protected]> wrote: > At what frequency do you have 1 nv per square root Hz with opamp and > what opamp ? > The 1/f region is the killer and if it is a low frequency shift in the > input > effectively changing the threshold then you have to be concerned about the > 1/f region. > Discrete embedded JFETs have the best 1/f of all such as the IF3601. > Go to www.interfet.com > 73 > Bill wa4lav > > > At 05:11 PM 2/28/2012 -0500, [email protected] wrote: >> Date: Tue, 28 Feb 2012 11:51:54 -0800 >> From: gary <[email protected]> >> To: Discussion of precise time and frequency measurement >> <[email protected]> >> Subject: Re: [time-nuts] OP-Amps for 10MHz distribution...? >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> You need to look at the driving impedance before you declare one >> technology "quieter" than another. That is, you have voltage noise and >> current noise. For low driving impedance, bipolar will be quieter since >> current noise will not be significant, plus a bipolar will have lower >> thermal noise. For high impedance, JFET may be a better solution. >> >> Opamps are around 1nv/rootHz these days. That isn't all that easy to >> achieve discretely. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
