1. Calculate the following ac performance quantities for the common emitter amplifier carcuit as shown below. (Given that, Bac = 120, Bpc =200 for Q4). Sketch the ac equivalent circuit. a. Voltage gain b. Current gain c. Input impedance d. Output impedance e. A (Overall Current Gain) 10V A4 C3 B4 22K 2K 100uF LR1 Q4 10K V1 C2 10mV / 50H2 100uF E4 D4 12K 1K 100uF

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.