[time-nuts] Need tiny 5MHz 10x amplifier

Graham / KE9H ke9h.graham at gmail.com
Sun Nov 29 02:01:02 UTC 2015


I would consider using a LVDS line receiver.

http://www.digikey.com/catalog/en/partgroup/lvds-differential-line-receivers/11820

They are available in SOT-23 package, and can have built-in hysteresis, and
3.3V
CMOS output.

--- Graham

==


On Sat, Nov 28, 2015 at 6:35 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>
wrote:

> I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
> CMOS compatible logic signal.
>
> The "default" comparator based circuit either requires a negative
> supply or 4 resitors for biasing the input and setting the zero level.
> (The hysteresis resistor is the same in both cases).
>
> Since space is a bit tight, I've been trying to find something like
> a "x10 self-biasing amplifier" but without luck.
>
> Any good ideas ?
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
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