EN 2-3

For a beta of 120, compute the collector current of the given circuit

• 2.26 mA

• 2.25 mA

• 2.24 mA

• 2.23 mA

Given VCC = 10 V, RC = 4.7 kΩ, RB = 250Ω, RE = 1.2 kΩ and β = 90 for the circuit shown, find:
(a) IB
(b) IC and
(c) VCE

• IB = -11.91 uA, IC = 1.07 mA, VCE = 3.687 V

• iB = -11.91 uA, IC = 1.07 mA, VCE = 3.688 V

• B = -11.91 uA, IC = 1.07 mA, VCE = 3.689 V

• B = -11.91 uA, IC = 1.07 mA, VCE = 3.690 V

Calculate the value of V6 and I5 for the circuit shown. Assume that β has a very large value.

• V6 = -4.475 V and I5 = 0.965 mA

• V6 = -4.475 V and I5 = 0.966 mA

• V6 = -4.475 V and I5 = 0.967 mA

• V6 = -4.475 V and I5 = 0.968 mA

Find V_2 if it assumes that the given circuit has a very large beta.

• V_2 = -0.6 V

• V_2 = -0.7 V

• V_2 = -0.8 V

• V_2 = -0.9 V

Find the value of VE, β, α, and VC for the given circuit if a measurement indicates that base voltage is -1.5V.4

• VE = -2.2 V, β = 3.53, α = 0.779, and VC = 3.7 V

• VE = -2.2 V, β = 3.53, α = 0.779, and VC = 3.8 V

• VE = -2.2 V, β = 3.53, α = 0.779, and VC = 3.9 V

• VE = -2.2 V, β = 3.53, α = 0.779, and VC = 4.0 V

For the JFET in the figure shown, VGS(off) = - 4V and IDSS = 12 mA, Determine the minimum value of VDD required to put the device in the constant-current region of operation.

• VDD(min) = 10.71 V

• VDD(min) = 10.72 V

• VDD(min) = 10.73 V

• VDD(min) = 10.74 V

The data sheet of a JFET gives the following information:
IDSS = 3 mA
VGS(off) = - 6V
gm (max) = 5,000 uS.

Determine the transconductance for VGS = -4V and find drain current ID at this point.

• gm = 1.67 mS and ID = 0.33 mA

• gm = 1.68 mS and ID = 0.33 mA

• gm = 1.69 mS and ID = 0.33 mA

• gm = 1.70 mS and ID = 0.33 mA

Calculate the transconductance of an n-channel MOSFET with the following parameters:
V_TN = 1 V
(1/2)u_nC_ox = 20 uA/V^2
W/L = 40
Assume the drain current is 1 mA.

• gm = 1.81 mS

• gm = 1.80 mS

• gm = 1.79 ms

• gm = 1.78 mS

Find ID for the given circuit:
k = 500uA/V^2
λ = 0.5/V
VTP = 1 V

• ID = 218 uA

• ID = 217 uA

• ID = 216 uA

• ID = 215 uA

What are the z parameters for the two-port network?

• z_11 = 60 Ω, z_12 = 40 Ω, z_21 = 40 Ω, z_22 = 70 Ω

• z_11 = 60 Ω, z_12 = 40 Ω, z_21 = 60 Ω, z_22 = 70 Ω

• z_11 = 60 Ω, z_12 = 40 Ω, z_21 = 80 Ω, z_22 = 70 Ω

• z_11 = 60 Ω, z_12 = 40 Ω, z_21 = 100 Ω, z_22 = 70 Ω