🚀 go-pugleaf

In article <1993Jan21.101200.8651@mr.med.ge.com> szopinsk@picard.med.ge.com (Jerry Szopinski Mfg 4-6983) writes:

>The voltage drop across the 1N4148 diode depends on what type of
>semiconductor material it is made of.  If the diode is made of
>germanium (no, not the flowers) the drop is around 0.7V; if it
>is made of silicon then the drop is around 0.5V.

	Nope; for Ge diodes 0.2-0.3V is typical.  Silicon is nominally
0.6-0.7 (but this ignores resistance, which can drive either Si or
Ge devices to 1V or more).  There are, for applications where this
voltage drop is inconvenient, Schottky rectifiers that use Si and
metal (Pt is typical) instead of N-Si and P-Si, and the forward
voltage drop of these Schottky devices is usually considerably
lower (0.3V or so).  Reverse holdoff voltages for Schottky diodes
are usually modest (35V or so), which limits their application.

	LEDs are made of materials that have forward drops ranging
from 1.2V (for IR) to 2.4V (the blue LEDs).

	John Whitmore