Question

Notify Me Bookmark

For the n-channel MOSFET circuit below the gate measured DC gate voltage is 3V as shown. You are given kn = 4mA/V2, VA = ∞, and Vt = 1V. a) Calculate the DC drain voltage, VD. b) Calculate the DC current out of the source, IS. c) What is the small signal transconductance parameter, gm.

For the n-channel MOSFET circuit below the gate measured DC gate voltage is 3V as shown. You are given kn = 4mA/V2, VA = ∞, and Vt = 1V. a) Calculate the DC drain voltage, VD. b) Calculate the DC current out of the source, IS. c) What is the small signal transconductance parameter, gm.

Image text
For the n-channel MOSFET circuit below the gate measured DC gate voltage is 3V as shown. You are given kn = 4mA/V2, VA = ∞, and Vt = 1V. a) Calculate the DC drain voltage, VD. b) Calculate the DC current out of the source, IS. c) What is the small signal transconductance parameter, gm.

Detailed Answer

1 0

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

Answer
Doubtrix Logo

This Problem has been solved!

You'll get a detailed, step-by-step and expert verified solution.

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
Login Sign Up
  • Student Reviews:
  • (1)
  • Correct answers (1)
  • Complete solution (1)
  • Step-by-step solution (1)
  • Fully explained (1)

Similar/Related Questions

Q6. An amplifier circuit using an n-MOSFET is shown in Fig. Q6. The n-MOSFET has the following parameters: Kn = 1 mA/V2 and λ = 0.02 V−1. vin is a small signal AC voltage source. Fig. Q6 (a) Calculate the DC gate voltage, VG. (b) Assuming that the n-MOSFET is operating in the saturation region and neglecting channel length modulation, calculate the threshold voltage, VTHN, given that the voltage drop across the dc current source, IBUS, has been designed to be approximately 0 V. Verify that the n-MOSFET is operating in the saturation region. (c) Find the values of small signal parameters gm and ro of the n-MOSFET. (d) What is the configuration of the amplifier circuit? (e) Draw the small signal ac equivalent circuit of Fig. Q6. You may assume that in the small signal ac equivalent circuit, all the coupling capacitors behave like short circuits. (f) Calculate the input resistance, Rin, and output resistance, Rout . (g) Calculate the voltage gain, vout/vin.

Solution
0 0

In the circuit below, the supply voltage is VDD = 3.3 V, R1 = 120 kΩ, R2 = 60 kΩ, R3 = 30 kΩ, R4 = 10kΩ, CX = CY = CZ = ∞F, and the NMOS transistor has a transconductance parameter k = 4 mA/V2, a threshold voltage Vt = 0.5 V, and a channel-length modulation coefficient λ = 0.5 V-1 . (a) Without including the channel-length modulation, calculate the transistor dc voltages and currents, VG, VS, VD, and ID, and verify the transistor region of operation. (b) Calculate the small-signal transconductance gm and drain-to source resistance ro, sketch the small-signal equivalent circuit, find the small signal midband voltage gain vy/vx, when vx is connected to an ideal voltage source, vy is open-circuited and vz is grounded, and find the small-signal midband voltage gain vz/vx, when vx is connected to an ideal voltage source, vy is grounded and vz is open-circuited.
Solution
0 0

Emitter follower: The figure below shows a common base amplifier using an NPN BJT which has a common emitter current gain of β = 200, and a base-emitter voltage of VBE = 0.7 V. Ignore the Early effect, i.e. take VA = ∞. The resistor values are RE = 4.7 kΩ, RB1 = 43 kΩ and RB2 = 56 kΩ. The supply voltages are ±5 V. The collector current is IC ≅ 1 mA. a) Draw the small-signal equivalent circuit b) Calculate the transistor's small signal transconductance gm, and the small signal input resistance rπ. c) Calculate the unloaded voltage gain, Avo, input resistance Rin and output resistance Rout of the amplifier. d) What are the loaded voltage gain, Av and overall gain Gv if Rsig = 1kΩ and RL = 1kΩ?
Solution
3 0