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 <p...@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 > p...@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. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.