Zero Bias Small Signal Threshold Diode for use with Imp

Hardware
1

I’m looking to connect a really small input signal into a diode where the diode will turn-on and conduct.
Anybody aware of a particular diode model that can handle really small input signals (e.g. 10 mv) in contrast to the typical 300 mv or 600 mv turn-on threshold voltage of other diodes?

2

I keep thinking transistor in my mind. Why a diode?

3

A diode’s Vf is just a characteristic of the material it’s made of. Standard diodes are around 0.7v, schottky’s can be around 0.4v.

LT make some very nice “ideal diodes” (comparators driving an internal FET) like this: http://cds.linear.com/docs/en/datasheet/4358fa.pdf … but really, what are you trying to do with this diode?