## What is the active logic level of a 2×4 decoder?

A 2-to-4 Binary Decoders The binary inputs A and B determine which output line from Q0 to Q3 is “HIGH” at logic level “1” while the remaining outputs are held “LOW” at logic “0” so only one output can be active (HIGH) at any one time.

**How does a 2×4 decoder work?**

In a 2-to-4 binary decoder, two inputs are decoded into four outputs hence it consists of two input lines and 4 output lines. Only one output is active at any time while the other outputs are maintained at logic 0 and the output which is held active or high is determined the two binary inputs A and B.

**What is a 2-to-4 line decoder?**

The 2-to-4 line binary decoder depicted above consists of an array of four AND gates. The 2 binary inputs labeled A and B are decoded into one of 4 outputs, hence the description of a 2-to-4 binary decoder. Each output represents one of the minterms of the 2 input variables, (each output = a minterm).

### How many and and NOT gate are required to implement 2×4 decoder?

The first-stage of 2-to-4 decoder requires four 2-input AND gates, because total number of logic combinations, that can be formed with two variables is four. Each logical combination of two variables A & B are given to input ports of respective AND gates.

**How many and and not gate are required to implement 2×4 decoder?**

**What is the difference between 2 to 4 decoder and 3 to 8 decoder?**

3 to 8 Decoder We know that 2 to 4 Decoder has two inputs, A1 & A0 and four outputs, Y3 to Y0. Whereas, 3 to 8 Decoder has three inputs A2, A1 & A0 and eight outputs, Y7 to Y0.

#### What is a decoder in logic circuits?

A decoder is a multiple-input, multiple-output combinational logic circuit. It converts the n bit data inputs into the coded 2n outputs. It decodes the information hidden by the encoder. While decoding, the decoder generally places a logic 1 at one of its outputs to create the exact code.

**Which decoder is combined to get a 4 to 16 line decoder?**

4 to 16 decoder circuit is obtained from two 3 to 8 decoder circuits or three 2 to 4 decoder circuits. When two 3 to 8 Decoder circuits are combined the enable pin acts as the input for both the decoders.

**What is a standard combinational logic decoder?**

Example, an inverter ( NOT-gate ) can be classified as a 1-to-2 binary decoder as 1-input and 2-outputs is possible. i.e an input A can give either A or A complement as the output. Then we can say that a standard combinational logic decoder is an n-to-m decoder, where m <= 2^n, and whose output, Q is dependent only on its present input states.

## How to construct 2 to 4 decoder with truth table?

Construct 2 to 4 decoder with truth table and logic diagram 1 Step 1. Now we know possible outputs for 2 inputs, so construct 2 to 4 decoder , having 2 input lines, a enable input… 2 Step 2. Now, it turns to construct the truth table for 2 to 4 decoder. E input can be considered as the control input. More

**What is the logic equation for decoder?**

In this circuit, the logic equation for D0 is A1/A0, and so on. Thus, each output of the decoder will be generated to the input combination. The applications of decoder involve in the making of various electronic projects. This is all about decoder, and its applications in communication-based projects.

**How to construct a decoder with two inputs?**

To construct a decoder, we require to know the number of all possible output lines that totally depends on the given input. So, if n represents given input lines then possible output lines would be 2 n . Decoder with two inputs would give 4 outputs (n=2,2 2 that is 4). Step 1.