A CS JFET amplifier has a load resistance of 10 kO , RD= 820O . If gm= 5mS and Vin= 500 mV, the output signal voltage is__________________?
Correct answer: D. 1.89 V
- A. 2.05 V
- B. 25 V
- C. 0.5 V
- D. 1.89 V
Explanation
The effective drain load is 820 Ω || 10 kΩ ≈ 758 Ω, so Av ≈ gm(RD || RL) = 0.005 × 758 ≈ 3.79. Multiplying by 0.5 V gives an output of about 1.89 V.
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