Find Logic Function in NMOS & PMOS Circuits

In summary, the task is to find the logic function of a circuit without body effect, using Nmos and Pmos current equations in each state of the transistor. The first step is to determine the overall structure of the circuit and then focus on the specific inputs A, B, and C in order to make signals change throughout the structure.
  • #1
erezb84
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Homework Statement


Find the logic function (without body effect)


Homework Equations


Nmos, Pmos current equations (in each state of the transistor).


The Attempt at a Solution


I am looking at the circut and get confused :(
don't know where to strart from...
help please? ...
 

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  • #2
erezb84 said:

Homework Statement


Find the logic function (without body effect)


Homework Equations


Nmos, Pmos current equations (in each state of the transistor).


The Attempt at a Solution


I am looking at the circut and get confused :(
don't know where to strart from...
help please? ...

You start by seeing what the overall structure can be used for, and then focus on what A, B and C need to be do make signals farther through the structure change...
 

1. How do you find the logic function in an NMOS or PMOS circuit?

To find the logic function in an NMOS or PMOS circuit, you must first analyze the circuit and determine the input and output nodes. Then, you can use Boolean algebra and logic gates to simplify the circuit and determine the logic function.

2. What is the difference between NMOS and PMOS logic circuits?

The main difference between NMOS and PMOS logic circuits is the type of transistor used. NMOS circuits use n-channel MOSFETs, while PMOS circuits use p-channel MOSFETs. This difference affects the implementation of the logic function and the power consumption of the circuit.

3. Can you give an example of a logic function in an NMOS or PMOS circuit?

One example of a logic function in an NMOS or PMOS circuit is an inverter, which produces the logical complement of its input. In an NMOS circuit, the input is connected to the gate of an n-channel MOSFET, while the output is taken from the drain. In a PMOS circuit, the input is connected to the gate of a p-channel MOSFET, and the output is taken from the source.

4. How do you optimize a logic function in an NMOS or PMOS circuit?

To optimize a logic function in an NMOS or PMOS circuit, you can use techniques such as transistor sizing, transistor stacking, and voltage scaling. These methods can help reduce power consumption, delay, and area of the circuit while maintaining the desired logic function.

5. What are the advantages and disadvantages of using NMOS and PMOS logic circuits?

The main advantage of NMOS logic circuits is their simplicity and low cost. They also have higher switching speeds compared to PMOS circuits. However, they consume more power and require a higher supply voltage. PMOS logic circuits have lower power consumption and can operate at lower supply voltages, but they are more complex and have slower switching speeds compared to NMOS circuits.

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