VBE = 10V in LTspice sim?

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opampsmoker

Member

• Nov 10, 2020

• #1

Hi,
Why is VBE of Q1 equal to 10V in this attached (albeit non realistic) LTspice sim?

 

Last edited: Nov 10, 2020

crutschow

Well-Known Member

Most Helpful Member

• Nov 10, 2020

• #2

No attachment.

 

ronsimpson

Well-Known Member

Most Helpful Member

• Nov 11, 2020

• #3

opampsmoker said:

Why is VBE of Q1 equal to 10V

Click to expand...

I get 0.65V. Depends on temperature and current and what type of transistor.

 

crutschow

Well-Known Member

Most Helpful Member

• Nov 11, 2020

• #4

If you are getting 10V Vbe, then you are likely putting many amps through the base-emitter junction (which would blow the transistor in real life).

 

ronsimpson

Well-Known Member

Most Helpful Member

• Nov 11, 2020

• #5

I wish spice had "smoke".
SPICE has a 1,000,000A voltage source that can drive a smokeless diode to 10 volts.