## How many possible output combinations are there for a 3 input truth table?

8 possible sets

Try using two OR gates and three Input Blocks to create a 3-input OR gate. Draw a schematic diagram for this circuit. Write out a truth table for this circuit. Like the 3-input AND circuit, this circuit will have 8 possible sets of input.

**How many outputs can a truth table have?**

As there is only one output, Y, there is only one output column. The truth table for the NOT gate in Table 1.2 shows that Y = 1 if A = 0, and Y = 0 if A = 1. So Y = A ¯ , the complement of A. The NOT gate is also sometimes referred to as an inverter due to the fact that it complements (inverts) its input.

**Can OR gate have 3 inputs?**

Like the AND gate, the OR function can have any number of individual inputs. However, commercial available OR gates are available in 2, 3, or 4 inputs types. Additional inputs will require gates to be cascaded together for example.

### What is the IC number of 3-input AND gate?

74LS11 Triple 3-Input AND Gate IC (7411 IC) DIP-14 Package.

**Can an AND gate have 3 inputs?**

**What does V mean in truth tables?**

The symbol that is used to represent the OR or logical disjunction operator is ∨. It resembles the letter V of the alphabet.

#### What is the equation of a three input AND gate?

y = a’bc’ + ab’c’ + ab’c The combinational circuit constructed from these two equations is shown in (a) of Figure 1.4(f). . Each 3-variable AND term is replaced by a 3-input AND gate.

**How big is a truth table with 3 variables?**

If there are three variables (p, q, and r), you will need 23 or 8 rows. 2.

**What are the truth tables for 2 and 3 input AND gates?**

2-input and 3-input logic AND Gate – Truth Tables The 2-input logic AND gate is the most known, although it can have many more inputs (A, B, C, etc.), but it only has one output: Q. The 2-input and the 3-input AND gates have the above truth tables. It is easy to see that the output Q is “1” (true) when the input A and B are both “1”.

## How to create a circuit from a truth table?

Creating a circuit from a truth table reverses to the process described above, and looking at Table 2.2.1 it can be seen that a logic 1 is produced at output X whenever the circuit inputs A, B and C are at logic 1.

**How to analyse the operation of a truth table?**

To analyse its operation a truth table can be compiled as shown in Table 2.2.1. Firstly a number of columns are written down which will describe, using ones and zeros, all possible conditions that can occur at the inputs and outputs of the circuit.

**When is the output of an AND gate true?**

The output of an AND gate is true (“1”) only when all inputs are true (“1”). If one or more inputs are false (“0”), then the output is false (“0”). The first image shows the symbol of a 2-input AND gate and the second one is the symbol of a 3-input AND gate.