How many and gates are required to implement a 3 to 8 decoder with an enable?

How many and gates are required to implement a 3 to 8 decoder with an enable?

three NOT gates
From the above Boolean expressions, the implementation of 3 to 8 decoder circuit can be done with the help of three NOT gates & 8-three input AND gates. In the above circuit, the three inputs can be decoded into 8 outputs, where every output represents one of the midterms of the three input variables.

What are the outputs of an 8 to 3 encoder?

The 8 to 3 Encoder or octal to Binary encoder consists of 8 inputs : Y7 to Y0 and 3 outputs : A2, A1 & A0.

How do you implement a function using 3/8 decoder?

A decoder with a,b as inputs and 2 outputs of decoder I.e., 2nd and 3rd connected to OR gate would give f function . A 3*8 decoder can be implemented using 2 2*4 decoder with one of input be enable for the 2 decoders .

How many gates are required to design the 3/8 decoder?

Using the above expressions, the circuit of a 3 to 8 decoder can be implemented using three NOT gates and eight 3-input AND gates as shown in fig (1). The three inputs A, B and C are decoded into eight outputs, each output representing one of the midterms of the 3-input variables.

What is the need of decoder make a 3/8 decoder using 2 to 4 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. We can find the number of lower order decoders required for implementing higher order decoder using the following formula.

Which are the enable pins for 3/8 decoder?

The device takes 3 input data and converts it to 8-bit data. This chip is high used in decoding in memory to minimize the effect of decoding. The chip includes three enable pin, three input pins, and 8 output pins.

What is encoder and decoder in DLD?

Encoder circuit basically converts the applied information signal into a coded digital bit stream. Decoder performs reverse operation and recovers the original information signal from the coded bits. 2. In case of encoder, the applied signal is the active signal input. Decoder accepts coded binary data as its input.

How to implement a Boolean expression using a 3*8 decoder?

So a decoder followed by an OR gate is enough to build a Boolean expression . A decoder with a,b as inputs and 2 outputs of decoder I.e., 2nd and 3rd connected to OR gate would give f function . A 3*8 decoder can be implemented using 2 2*4 decoder with one of input be enable for the 2 decoders .

How to do 3 to 8 decoder using 2 to 4 decoders?

The block diagram of 3 to 8 decoder using 2 to 4 decoders is shown in the following figure. The parallel inputs A 1 & A 0 are applied to each 2 to 4 decoder. The complement of input A 2 is connected to Enable, E of lower 2 to 4 decoder in order to get the outputs, Y 3 to Y 0. These are the lower four min terms.

What is the logical diagram of the 3×8 line decoder?

The logical diagram of the 3×8 line decoder is given below. 3 to 8 line Decoder has a memory of 8 stages. It is convenient to use an AND gate as the basic decoding element for the output because it produces a “HIGH” or logic “1” output only when all of its inputs are logic “1”.

What is decdecoder and how it works?

Decoder is a combinational circuit that has ‘n’ input lines and maximum of 2 n output lines. One of these outputs will be active High based on the combination of inputs present, when the decoder is enabled. That means decoder detects a particular code.