Mumbai University > EXTC > Sem 3 > Analog Electronics 1

Marks: 4 M

Year: Nov 2013

• DC load line is drawn on output characteristic.
• For common base output characteristic are $I_C$ vs $V_{CB}$ at a constant $I_E$ emitter current.
• Calculation for $V_{CB}$ and $I_{CB}$

Fig1. DC analysis of circuit

• Applying KVL to collector-base loop,

  $V_{CB}-I_CR_C-V_{CC}=0$

1. To find $V_{CB}$, Put $I_C=0$ we get $V_{CB}=20V$
2. To find $I_C$, Put $V_{CB} =0$ we get $I_C =\frac{V_{CC}}{R_C} =\frac{20}{4k}=5mA$

Fig2. DC load line graph