Question

Notify Me Bookmark

For the circuit shown below, calculate the cutoff frequency (3dB frequency) at node X. Assume the voltage gain from the gate of M1 to the source of M1 is 0.9 V/V. Assume ideal Vdd and IBias. (Consider capacitance Cgs and Cgd only.) (20 points) M1 Cgs = 200fF Cgd = 20fF

For the circuit shown below, calculate the cutoff frequency (3dB frequency) at node X. Assume the voltage gain from the gate of M1 to the source of M1 is 0.9 V/V. Assume ideal Vdd and IBias. (Consider capacitance Cgs and Cgd only.) (20 points) M1 Cgs = 200fF Cgd = 20fF

Image text
For the circuit shown below, calculate the cutoff frequency ( 3 d B frequency) at node X . Assume the voltage gain from the gate of M 1 to the source of M 1 is 0.9 V / V . Assume ideal Vdd and I Bias. . (Consider capacitance Cgs and Cgd only.) (20 points)
M 1 C g s = 200 f F C g d = 20 f F

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

The MOSFET in the common source amplifier is shown below. All the MOSFETs are identical. Assume negligible channel length modulation. VTn = +1 V, μ = 600 cm2/V⋅s, Cox’ = 0.23 μF/cm2, Cgs = 1 pF, and Cgd = 0.2 pF. (50pts) RS = 1 MΩ RG = 1 MΩ RD = 10 kΩ RL = 10 kΩ (i) Calculate the MOSFET W/L such that the bias current of M1 and transconductance of M1 are 1 mA and 5 mS, respectively. (ii) Find the mid frequency voltage gain in dB. (iii) Find the upper 3-dB frequency, fH. (iv) Find the value of CG, CS, and CD such that the corresponding poles are at 1 Hz, 100 Hz, and 10 Hz, respectively. (v) Write down all the zeros and poles of the overall amplifier (3 zeros and 3 poles for the lower frequency response and 1 pole for the higher frequency response). Sketch and carefully label the Bode plot for the gain magnitude (indicate the corner frequency and the slope). Specify the lower 3-dB frequency fL.
Solution
0 0

For the circuit shown below, all transistors operate in the saturation region. a. Assuming that ID1 = ID4, calculate the DC currents of M1 to M5. b. Determine the ac output impedance c. Calculate the ac voltage gain d. Calculate the ac input impedance e. Calculate the maximum voltage swing at the gate node of M4 f. What is the minimum value of VG4 to keep M4 in saturation? g. Maximum amplitude of input ac signal for linear operation of the circuit NMOS current equation in saturation is iD = K(vGS − Vth)2 Ignore channel-length modulation in DC analyses. R1 = 6 KΩ, R2 = 4 KΩ, R3 = 100 Ω, R4 = 0.6 KΩ, VDD = 4 V, VA = 100 V Kn = 1 mA V2, KP = 25 16 mA V2, Vth1 = 0.5 V, Vth2 = 0.4 V, RS = 100 Ω
Solution
0 0

(40 points) MOSFET Amplifiers. a. (10 points) For the MOSFET amplifier circuit shown below, draw and label a small signal equivalent circuit. In your small signal equivalent circuit, include coupling capacitors CG1, C12, and CS2 and the Cgd and Cgs of each transistor. b. (10 points) For the ampifier in part a, the current sources have a Norton resistance of 8K Ohms. The load is 5K Ohms. Find the midband voltage gain Av. For transistor M1 ro = 12KOhms ID = 2mA VGS = 0.8V For transistor M2 ro = 10KOhms ID = 1.8mA VGS = 0.7V c. For the small signal equivalent circuit shown below, find the poles of the circuit. You may use Miller's approximation. d. For a step function for the input voltage in the switching MOSFET circuit shown below, estimate the time it takes for vgs to rise to 4.8 Volts. The transistors are a CMOS pair with Cgs = 1.0 nF for the NMOS and Cgs = 0.5 nF for the PMOS. Cgd is too small to be significant for this calculation.
Solution
0 0