Question

Notify Me Bookmark

Consider the given circuit. The MOSFETs are equal and have parameters kn = 0.1 mA/V2, λ = 0, Vtn = 1 V Calculate the asked parameters and fill in the table. a) Find the operating point currents (ID and IS) and voltage VO. b) Obtain small signal equivalent circuit with T model c) Small signal voltage gain Vo/Vsig

Consider the given circuit. The MOSFETs are equal and have parameters kn = 0.1 mA/V2, λ = 0, Vtn = 1 V Calculate the asked parameters and fill in the table. a) Find the operating point currents (ID and IS) and voltage VO. b) Obtain small signal equivalent circuit with T model c) Small signal voltage gain Vo/Vsig

Image text
Consider the given circuit.The MOSFETs are equal and have parameters k n = 0.1 m A / V 2 , λ = 0 , V t n = 1 V Calculate the asked parameters and fill in the table. a) Find the operating point currents ( I D and I S ) and voltage V O . b) Obtain small signal eqivalent circuit with T model c) Small signal voltage gain Vo/Vsig

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

For the shown amplifier, RD = 1kΩ, Rs = 50Ω, and VDD = 6V. The NMOS device parameters are as follows: K1 = 1/2kn’(W/L)M1 = 4 mA/V2, K2 = 1/2kn’(W/L)M2 = 1 mA/V2; where kn = KP = μn⋅Cox Assume that the Early voltage magnitude is infinity (λ = 0) for the transistors, and that the threshold voltages are Vto = 1 V. a) Find the DC bias voltage VB that establishes a DC operating point with Vout (DC) = 5 V. (6 points) VB= b) Calculate the small-signal transconductances (gm1, gm2) of transistors M1 and M2. (4 points) gm1 = , gm2 = c) Draw the small-signal equivalent circuit. (5 points) d) Derive the equation (in terms of small-signal model parameters and resistors as variables) for the small-signal voltage gain (Avs = Vout/Vs) and calculate its value. Assume that the coupling capacitor has a large value. (10 points) Avs =
Solution
0 0

Q (100p):For the given circuit, V+ = 15 V, V− = −15 V, I1 = I2 = 0, 5 mA. R1 = R2 = 2 MΩ where R1 is the internal resistance of l1 current source and R2 is the internal resistance of I2 current source. Current gain of Q3 transistor is β = 80. VBE = 0.7 V, VA = 75 V and VT = 25 mV. M1 and M2 are identical MOSFETs where KP = μpCox(W/L) = 5 mA/V2 and VTP = −1 V. Considering DC conditions, VODC = 0 V. a) Calculate RD and the operating points of M1, M2 and Q3 transistors considering λ = 0 and ignoring base current of Q3 transistor. (30p) b) Draw mid-frequency small signal equivalent circuit. (You should add output resistance of Q3 to equivalent circuit.) (30p) c) Derive the expression of voltage gain v0/(v1 − v2) and calculate its value. (You should include the value of output resistance of Q3 in your calculations.) (40p)
Solution
0 0

In the circuit below, VDD = 3 V, R1 = 50 kΩ, R2 = 100 kΩ, R3 = R4 = 5 kΩ, Rs = 1 kΩ and RL = 30 kΩ, C1, C2 and C3 have large values. The transistor operates at the DC point of ID = 0.2 mA, VDS = 1 V and VGS − VTN = 0.5 V. The transistor has λ = 0.1 V−1 and a negligible body effect. (a) Identify the circuit as a common-source, common-drain, or common-gate amplifier. (b) Calculate the small-signal parameters gm and rds of the transistor. (c) Draw an AC small-signal equivalent of the circuit, with the transistor represented by its small-signal model. (d) Calculate the AC small-signal voltage gain vo/vs. (e) Calculate the AC small-signal input and output resistances Rin and Rout.
Solution
0 0