Topic: Analog Electronics
Equivalent circuit of FET is shown in the figure below, where r_g = 100 Ή, C_gs = 0.1 pF and g_m = 0.1 mho. For load resistance r_L = 500 Ή, the voltage gain at 1 GHz is:
- A. 50
- B. 30
- C. 20
- D. 100
Answer: A. 50
Explanation: Voltage gain (A_v) = g_m * r_L = 0.1 * 500 = 50.