An npn BJT has gm = 38 mA/v, Cµ = 10-14 F, Cπ = 4 × 10-13 F and DC current gain β0 = 90. For this transistor fT fβ are

fT = 1.47 x 1010 Hz fβ = 1.64 x 108 Hz

This question belongs to Electronics And Communications Engineering Analog Electronics

Analog Electronics

An npn BJT has g_m = 38 mA/v, C_µ = 10^-14 F, C_π = 4 × 10^-13 F and DC current gain β₀ = 90. For this transistor f_T & f_β are

A) f_T = 1.64 x 10⁸ Hz & f_β = 1.47 x 10¹⁰ Hz B) f_T = 1.47 x 10¹⁰ Hz & f_β = 1.64 x 10⁸ Hz C) f_T = 1.33 x 10¹² Hz & f_β = 1.47 x 10¹⁰ Hz D) f_T = 1.47 x 10¹⁰ Hz & f_β = 1.33 x 10¹² Hz

Answer & Solution

Correct Answer: Option B

Let's discuss the solution. Join the discussion

Question posted by Examveda

Community

Join the Discussion

2 Comments

Join the discussion

Rehmat Ali 3 years ago

fT = gm / 2π(Cπ +Cπ)
fβ = fT / β0

Given values:
gm = 38 mA/V
Cµ = 10^(-14) F
Cπ = 4 × 10^(-13) F
β0 = 90

Calculating fT:
fT = (38 mA/V) / 2π(10^(-14) + 4 × 10^(-13) F)

Satyabrata Satapathy 4 years ago

Please sir How to solve this Question

Keep Learning

An npn BJT has gm = 38 mA v C =...

An npn BJT has gm = 38 mA/v, Cµ = 10-14 F, Cπ = 4 × 10-13 F and DC current gain β0 = 90. For this transistor fT & fβ are

Join the Discussion

Related Questions on Analog Electronics

An npn BJT has g_m = 38 mA/v, C_µ = 10^-14 F, C_π = 4 × 10^-13 F and DC current gain β₀ = 90. For this transistor f_T & f_β are