Question is ⇒ For a npn BJT transistor fβ is 1.64 x 108 Hz. Cμ = 10-14 F; Cp = 4 x 10-13 F and DC current gain is 90. Find fT and gm (fβ = cut off frequency, Cμ = capacitance, Cp = parasitic capacitance, gm = transconductance, fT = gain BW product), Options are ⇒ (A) fT = 1.47 x 1010 Hz ; gm = 38 milli mho, (B) fT = 1.64 x 108 Hz ; gm = 30 milli mho, (C) fT = 1.47 x 109 Hz ; gm = 38 mho, (D) fT = 1.33 x 1012 Hz; gm = 0.37 m-mho, (E) , Leave your comments or Download question paper.

Question is ⇒ For a npn BJT transistor fβ is 1.64 x 108 Hz. Cμ = 10-14 F; Cp = 4 x 10-13 F and DC current gain is 90. Find fT and gm (fβ = cut off frequency, Cμ = capacitance, Cp = parasitic capacitance, gm = transconductance, fT = gain BW product), Options are ⇒ (A) fT = 1.47 x 1010 Hz ; gm = 38 milli mho, (B) fT = 1.64 x 108 Hz ; gm = 30 milli mho, (C) fT = 1.47 x 109 Hz ; gm = 38 mho, (D) fT = 1.33 x 1012 Hz; gm = 0.37 m-mho, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	For a npn BJT transistor f_β is 1.64 x 10⁸ Hz. C_μ = 10^-14 F; C_p = 4 x 10^-13 F and DC current gain is 90. Find f_T and g_m (f_β = cut off frequency, C_μ = capacitance, C_p = parasitic capacitance, g_m = transconductance, f_T = gain BW product)
A.	f_T = 1.47 x 10¹⁰ Hz ; g_m = 38 milli mho [Correct Answer]
B.	f_T = 1.64 x 10⁸ Hz ; g_m = 30 milli mho [Wrong Answer]
C.	f_T = 1.47 x 10⁹ Hz ; g_m = 38 mho [Wrong Answer]
D.	f_T = 1.33 x 10¹² Hz; g_m = 0.37 m-mho [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments