Question

please solve and explain

#1(30p) For the transistor bias network below: a) identify the type of transistor b) identify all terminals c) label all typical transistor voltages and currents 12v 430ks2 W 5 d) find the Q-point, if VTo-IV, γ-0,--, K '-100μΑΝ", The arrow at the transistor goes out at the bottom terminal 200kΩ 47kS2

Answer 1

V_G = V_th = 3.31 v Assume transistor in saturation region I_D = 1/2 (W/L)(V_GS - VT)^2 given V_t = 1v, gamma = 0 W/L = 5 k^1 = 100 mu A /v^2, lambda = 0 V_GS = 3.81 - V_S = 3.31 - I_D 47 k I_D = 1/2 times 100 times 10^-6 times 5 (3.31 - I_D 47 k - 1)^2 = 25 times 10^-5 (2.81 - I_D 47 k)^2 4000 I_D = (2.31)^2 - 2 times 2.31 times I_D times 47 times 10^3 + I_D^2 (47 times 10^3)^2 4000 I_D = 7.9 - 264140 I_D + I_D^2 2209 times 10^6 2209 times 10^6 I_D^2 - 268140 I_D + 7.9 = 0 I_D = 7.105 times 10^-5 = 71.05 mu A = 50.3 mu A V_GS = V_G - V_C = 3.81 - 71.05 times 10^-6 times 47 times 10^3 = 0.4705 V_t V_GS = 3.31 - 50.3 times 10^-6 times 47 times 10^3 = 1.4459 > V_t = 1v I_D = 50.3 mu A \r\n V_D =