Question

Notify Me Bookmark

Consider the CMOS inverter of Fig. 14.22 with QN and QP matched and with the input vI rising slowly from 0 to VDD. At what value of vI does the current flowing through QN and QP reach its peak? Give an expression for the peak current, neglecting λn and λp. For k’n = 500 μA/V2 , (W/L)n = 1.5, VDD = 1.3 V, and Vtn = 0.4V, find the value of the peak current.

Consider the CMOS inverter of Fig. 14.22 with QN and QP matched and with the input vI rising slowly from 0 to VDD. At what value of vI does the current flowing through QN and QP reach its peak? Give an expression for the peak current, neglecting λn and λp. For k’n = 500 μA/V2 , (W/L)n = 1.5, VDD = 1.3 V, and Vtn = 0.4V, find the value of the peak current.

Image text
Consider the CMOS inverter of Fig. 14.22 with QN and QP matched and with the input vI rising slowly from 0 to VDD. At what value of vI does the current flowing through QN and QP reach its peak? Give an expression for the peak current, neglecting λn and λp. For k’n = 500 μA/V2 , (W/L)n = 1.5, VDD = 1.3 V, and Vtn = 0.4V, find the value of the peak current.

Detailed Answer

2 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:
  • (2)

Similar/Related Questions

Consider a standard CMOS inverter with QN and QP matched and with the input vi rising slowly from 0 to VDD. At what value of vi does the current flowing through QN and QP reach its peak? Give an expression for the peak current, neglecting λn and λp. For kn’ = 500 μA/V2, (W/L)n = 1.5, VDD = 1.3 V, and Vtn = 0.4 V, find the value of the peak current. (Hint: Max current is during switching when for a brief moment, both transistors are in the saturation mode and "half on").
Solution
2 0

The transmission gate of Fig. 18.7 is fabricated in a CMOS process technology for which = 450 μA/V2, = 150 μA/V2, Vtn = |Vtp|, Vt0 = 0.35 V, γ = 0.25 V1/2, 2ϕf = 1.0 V, and VDD = 1 V. Let QN and QP have dimensions (W/L)n = (W/L)p = 130 nm/65 nm. The total capacitance at the output node is 5 fF. Use as many of the results of Example 18.1 as you need. (a) What are the values of VOH and VOL? (b) For the situation in Fig. 18.7(a), find iDN(0), iDP(0), iDN(tPLH), iDP(tPLH), and tPLH. (c) For the situation depicted in Fig. 18.7(b), find iDN(0), iDP(0), iDN(tPHL), iDP(tPHL), and tPHL. At what value of vO will QP turn off? (d) Find tP. (a)

Solution
0 0

Q1. Consider the CMOS inverter of which the transistors have the following parameters: μnCox = 4μpCox = 160 μA/V2, ∣γ| = 0.5 V1/2, 2Φf = 0.5 V, λ = 0.001 V−1, Vtno = 0.6 V, Vtpo = −0.8 V, (W/L)n = 1 and (W/L)p = 4. The supply voltage VDD = 3.3 V. The capacitive load at the output node is 20 pF. The input voltage Vin is expected to be a perfect periodic square wave with full swing (low level : 0 V, high level: VDD). (a) Calculate tl, the time required for the output voltage Vout to change from 0 V to the threshold voltage of the inverter, using the average-current method. (b) Write the expression of calculation of t2, the time required for the output voltage Vout to change from 2.9 V to the 0.4 V, using the analytical method (integral). Then calculate t2 using the average-current method. (c) Determine the maximum frequency of the periodic square wave input so that the output signal will have a full swing in each cycle. (d) Calculate the peak value of in, the NMOS transistor current, during the transition, and its average value over a clock cycle T. (The average value here is not the same as the average-current in the "average-current method" for delay estimation) (e) If the capacitive load is now changed to be 250 pF, what can be done to make tl and t2 unchanged?
Solution
0 0