Discussion in 'Homework Help' started by babyboyx, Sep 23, 2009.
with just this data sheet of this diode, how do draw a IV and a CV graph.
The diode you show is a special type.
It is a so called varicap diode.
It is mounted in reverse and uses the voltage across the diode to control the capacitance.
Attached you will find two datasheets.
an AM varicap diode BB212
AND a small signal diode 1N4448
so that mean the graph i cn base on the bb212 to draw . But how it related to the 1N4448 ?
I showed you the two datasheets to see the difference between the varicap and a conventional diode.
The BB139 will have a capacitance curve in reverse mode.
The capacity will be lower as the BB212 as the BB139 is for VHF and the BB212 for AM.
Here is also a page from the EDUCYPEDIA on several diode types: