🚀 go-pugleaf

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.  

According to the data sheet, it is allways made of silicon.

>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.

The voltage drop across a Ge diode is about 0.2 V, across a Si
diode about 0.65 V, depending on the current, the temperature and
the exact structure.

>The 1N4148 is usually used in computer applications and most
>general purpose circuit board applications where small currents
>are used.  I agree that the 1N4001 would be a better diode for
>this particular application.

The 1N4148 is a high speed diode intended for switching applications,
the 1N4001 is intended for rectifier circuits at low frequencies.

Regards,

Claude