Multiple choice

Consider the common emitter amplifier shown below with the following circuit parameters.

B = 100, gm = 0.3861 A/V, r0 = $\infty$, rp = 259 W, RS = 1k W, RB = 93kW, RC = 250 W, RL = 1k W, C1 = $\infty$ and C2 = 4.7mF.

The resistance seen by the source Vs is

  1. 258$\Omega$
  2. 1252$\Omega$
  3. 93 K$\Omega$
  4. $\infty$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

By using given solution figure and solution                            Rin = 1000 + [(9300 * 259)/(9300 + 259)] = 1252 om                                                      

Keep practicing — related questions