Designing a 2-Input XOR Gate: RL=1KΩ, VDD=1.8V

In summary, the task is to design a 2-input XOR gate using transistors with the given specifications, including a 1KΩ load, 1.8V VDD, 0.1V VOL, and 1.7V VOH. The solution may involve considering the ON resistance of FETs and ensuring that the output voltage swing meets the logic 1 or 0 requirements for the next gate.
  • #1
jean28
85
0

Homework Statement



Design a 2-input XOR with the following specifications:

RL = 1KΩ
VDD = 1.8V
VOL = 0.1V
VOH = 1.7V


Homework Equations



Triode:
Id = μnCox W/L VDS (VGS - Vt - VDS/2)

Cutoff:
Id = 0.



The Attempt at a Solution



Searching on my book I found the image attached which is an implementation of an XOR gate with transistors. However, how can I use the voltages given to "design" the transistor? I just don't get it very well.
 

Attachments

  • XOR.jpg
    XOR.jpg
    23.6 KB · Views: 493
Physics news on Phys.org
  • #2
Is the question asking you for an implementation with generic transistors (as in your attached picture), or something involving the design of the transistors themselves (as you imply with your equations)? You can see that you don't need rail-to-rail output (Voh and Vol) and that you need to be able to source enough current to drive a 1k load (i.e. 1.8V / 1k)
 
  • #3
FETs have ON resistance that will affect the output voltage delivered to the load. Think of it as a potential divider problem where the output voltage swing must be at least enough to meet the definition of a logic 1 or 0 for the next gate to use as an input.
 

FAQ: Designing a 2-Input XOR Gate: RL=1KΩ, VDD=1.8V

1. What is a 2-Input XOR Gate?

A 2-Input XOR gate is a logic gate that takes in two binary inputs and outputs a single binary signal based on a specific logical operation. In this case, the gate performs an exclusive OR (XOR) operation, which means the output will be 1 only if one of the inputs is 1, but not both.

2. What are the components of this XOR gate?

This XOR gate has two inputs, each with a resistor (RL) of 1KΩ, and a voltage supply (VDD) of 1.8V. It also has an output that will be either 1 or 0 depending on the inputs and the operation performed.

3. How does the resistor (RL) affect the performance of the XOR gate?

The resistor (RL) helps to limit the current flow in the circuit and ensures that the inputs and outputs are at the desired voltage levels. In this case, the 1KΩ resistor helps to create a voltage divider with the 1.8V supply, which is necessary for the XOR operation to work correctly.

4. Can this XOR gate handle different input voltages and resistances?

Theoretically, this XOR gate can handle different input voltages and resistances as long as they are within the specified range (1.8V for VDD and 1KΩ for RL). However, using different values may affect the performance and accuracy of the gate and may require additional adjustments or modifications.

5. What are some practical applications of a 2-Input XOR Gate?

XOR gates are commonly used in digital electronics, such as in computers and microcontrollers, to perform logical operations and create more complex circuits. They are also used in encryption and error-detection systems, as well as in mathematical and scientific calculations.

Similar threads

Class A Amplifier Sinusoidal Input/Output Relation
Replies
3
Views
3K
Designing CMOS Logic XOR Gate & 2:1 Multiplexer
Replies
1
Views
3K
Designing a Two-Bit Adder Using Verilog Primitive Gates
Replies
1
Views
5K
How Do You Calculate Transistor Parameters with Given Voltages and Currents?
Replies
2
Views
3K
Designing Logic Gates for Multiple Inputs and Outputs in Homework Problems
Replies
1
Views
3K
Qn5What is the purpose of using a self-biased circuit for MOSFET amplifiers?
Replies
3
Views
38K

Hot Threads

Recent Insights

Back
Top