BJT Transitor computation

  • Thread starter Thread starter MT00KSTN - Hai Ly Hoang
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MT00KSTN - Hai Ly Hoang

I have a transitor 2N2222.
The C is connect to resistor R1.
The B is connect to source and resistor R2.
The E is connect tot resistor R3.
Anyone can suggest me web links that teach how to calc such value as the
current which flow the R3, the voltage between B and E terminal ?
Thank in advance
 
MT00KSTN - Hai Ly Hoang said:
I have a transitor 2N2222.
The C is connect to resistor R1.
The B is connect to source and resistor R2.
The E is connect tot resistor R3.
Anyone can suggest me web links that teach how to calc such value as the
current which flow the R3, the voltage between B and E terminal ?
Thank in advance
Click to expand...
The voltage between B and E (PN junction) is a function of collector current
and temperature. For a small signal transistor at room temperature its about
0.7V. Unless you are designing logarithmic or exponential amplifiers this
value is good enough for most practical calculations. The exact value is
Vbe=[ln(Ic + Io) -lnIo]kT/q
 
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