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How do we compute the output impedance of a simplified CB amplifier?(a) RC + RL(b) RB + RL(c) RC || RL(d) RB || RLThis question was posed to me in final exam.My doubt stems from Simplified Calculations for the CB Configuration topic in chapter Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer»

The CORRECT choice is (c) RC || RL

For EXPLANATION I would SAY: The output impedance of a simplified common base (CB) amplifier can be expressed in terms circuit resistor VALUES. The base impedance is RC || RL. Where RC is the equivalent collector resistance and RL is the equivalent load resistance.



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