Why is Vbc = Vbe - Vce ?

[[email protected]]

I have seen in various places the equation Vbc = Vbe - Vce for NPN and
PNP transistors. It may seem obvious to others but I just don't see
how this is true. Could someone please throw me a bone? Thanks

 

[Rich Webb]

I have seen in various places the equation Vbc = Vbe - Vce for NPN and
PNP transistors. It may seem obvious to others but I just don't see
how this is true. Could someone please throw me a bone? Thanks

(Vb - Ve) - (Vc - Ve) = Vb - Ve - Vc + Ve = (Vb - Vc)

 

[Andrew Holme]

I have seen in various places the equation Vbc = Vbe - Vce for NPN and
PNP transistors. It may seem obvious to others but I just don't see
how this is true. Could someone please throw me a bone? Thanks

Vce = Vcb + Vbe

Vcb = Vce - Vbe

Vbc = Vbe - Vce

Polarity is important.

 

[pimpom]

I have seen in various places the equation Vbc = Vbe - Vce for
NPN and
PNP transistors. It may seem obvious to others but I just
don't see
how this is true. Could someone please throw me a bone?
Thanks

Maybe this will help. View the ASCII diagram with mono-spaced
font such as the WinXP default Lucida Console or Courier:

__ __
| | |
| | |
| | |
Vbc | |
| / |
| |/ |
|___| Vce
| |\ |
| \ |
| | |
Vbe | |
| | |
|__ | __|

 

[Jasen Betts]

I have seen in various places the equation Vbc = Vbe - Vce for NPN and
PNP transistors. It may seem obvious to others but I just don't see
how this is true. Could someone please throw me a bone? Thanks

Vbc = Vbe + Vec

from B to C is the same as from B to E and E to C

Kirchoffs node law.

Bye.
Jasen