Question

Notify Me Bookmark

Draw the circuit diagram of a CMOS gate (showing all the transistors) which implements the logic function ((A + B + C) • D) + E b. (15pt) On the circuit diagram show the sizes of the NMOS and PMOS devices so that the network has approximately the same worst case tpHL and tpLH as an inverter (with an NMOS W = 5µm and PMOS W = 11µm.) which is driving an equal capacitance. Assume that self-capacitances are negligibly small compared to the load capacitance. Avoid increasing the area unnecessarily.

Draw the circuit diagram of a CMOS gate (showing all the transistors) which implements the logic function ((A + B + C) • D) + E b. (15pt) On the circuit diagram show the sizes of the NMOS and PMOS devices so that the network has approximately the same worst case tpHL and tpLH as an inverter (with an NMOS W = 5µm and PMOS W = 11µm.) which is driving an equal capacitance. Assume that self-capacitances are negligibly small compared to the load capacitance. Avoid increasing the area unnecessarily.

Image text
Draw the circuit diagram of a CMOS gate (showing all the transistors) which implements the logic function ((A + B + C) • D) + E b. (15pt) On the circuit diagram show the sizes of the NMOS and PMOS devices so that the network has approximately the same worst case tpHL and tpLH as an inverter (with an NMOS W = 5µm and PMOS W = 11µm.) which is driving an equal capacitance. Assume that self-capacitances are negligibly small compared to the load capacitance. Avoid increasing the area unnecessarily.

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

Determine the sizes of the NMOS and PMOS devices so that the network has approximately the same worst case tpHL and tpLH as an inverter (with an NMOS W/L = 1µm/0.25µm and PMOS W/L = 2µm/0.25µm.) which is driving an external capacitance of 20pF. Avoid increasing the area unnecessarily.
Solution
1 0

Vtn = 0.8 V, Vtp = -0.9 V, a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below. = 250 a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below., a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below. =120 a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below. is given. The pull-down section of a CMOS logic circuit is shown below.

a) Find the logic expression for Z. What function does this circuit implement?

b) Draw the pull-up network that completes the CMOS logic circuit.

c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 müm/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below. for the equivalent inverter.

d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit.

a) Find the logic expression for Z. What function does this circuit implement? b) Draw the pull-up network that completes the CMOS logic circuit. c) Assume that the equivalent inverter has an NMOS transistor with a minimum size of 2 um/250 nm. Determine the equivalent PMOS transistor dimensions (W/L) that ensure tPHL = tPLH for the equivalent inverter. d) Find the NMOS and PMOS transistor dimensions in the CMOS logic circuit so that the propagation delays are equal to the value you found for the inverter in c) for the worst case, assuming an equal load capacitance for both the inverter and the logic circuit. Vtn = 0.8 V, Vtp = -0.9 V, unCox = 250 uA/V2, upCox = 120 uA/V2 is given. The pull-down section of a CMOS logic circuit is shown below.
Solution
0 0

Design a CMOS logic gate for the function: Y = (A + B)(CD + E ). Assume that there is only a capacitance CL at the output node. There are no other capacitances at other nodes. a. Draw the circuit schematic for the logic gate. Show inputs clearly and number each transistors (e.g. MN1, MN2, ... for NMOS and MP1, MP2, .. for PMOS) b. Show the paths for worst and best case delays for both tPLH and tPHL. Determine delay times in terms of Req and CL. Give distinct Req values for each transistor (RMN1, RMN2, RMP1, RMP2, etc.). c. Assume there is an inverter designed in the same process as this logic gate that has the size of (W/L)P = k for PMOS and (W/L)N = m for NMOS. In order for the CMOS gate that realizes function Y to have the same tPLH and tPHL as this inverter at the worst case delay scenario, determine the size of each PMOS and NMOS in the gate you designed in terms of k and m respectively.
Solution
0 0