How many 3 to 8 decoders are used to construct a 4 to 16 decoder which all other units are used to construct it other than decoder and how many?

A decoder circuit of the higher combination is obtained by adding two or more lower combinational circuits. 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.

How many gates does it take to implement a 4/16 decoder?

Therefore, a 4–16 decoder can be implemented with 2 2–4 inverting decoders and 16 2-input NOR gates, and an inverting one can be implemented with 2 2–4 decoders and 16 2- input NAND gates. In CMOS logic, these designs require 8 inverters and 24 2-input gates, yielding a total of 104 transistors each.

What is decoder design a 3×8 decoder?

3 to 8 line decoder demultiplexer is a combinational circuit that can be used as both a decoder and a demultiplexer. IC 74HC238 decodes three binary address inputs (A0, A1, A2) into eight outputs (Y0 to Y7). The device also has three Enable pins. The same combination is used as a demultiplexer.

How many 1 to 2 decoders and 4 input AND gates are needed to construct a 4 to 16 decoder?

Therefore, we require two 3 to 8 decoders for implementing one 4 to 16 decoder.

How many inputs are required for a 4 16 decoder?

Explanation: A binary decoder is a combinational logic circuit which decodes binary information from n-inputs to a maximum of 2n outputs. Here, number of outputs = 16. 16 = 24 = 2n. Thus, number of inputs is 4.

How many inputs are needed for a 16 decoder?

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 a decoder used for?

Introduction Of Decoder. The decoder is an electronic device that is used to convert digital signal to an analogue signal. It allows single input line and produces multiple output lines. The decoders are used in many communication projects that are used to communicate between two devices.

How to design a 4 to 16 decoder using 3 to 8 decoder?

Circuit Design of 4 to 16 Decoder Using 3 to 8 Decoder 1 Truth Table. The Enable (E) pin acts as one of the input pins for both 3 to 8 decoder circuits. 2 Circuit Diagram of 4 to 16 Decoder. 3 Applications of Decoders. In every wireless communication, data security is the main concern. The decoders are mainly… More

What is the block diagram of 4 to 16 decoders?

The block diagram of 4 to 16 decoder using 3 to 8 decoders is shown in the following figure. The parallel inputs A 2, A 1 & A 0 are applied to each 3 to 8 decoder. The complement of input, A3 is connected to Enable, E of lower 3 to 8 decoder in order to get the outputs, Y 7 to Y 0. These are the lower eight min terms.

How many gates are used in a 3 to 8 decoder?

From the above table , a 3-to-8 line decoder is designed by using three NAND gates and three NOT gates. NOT gates generate the complement of input while the NAND gates generate max terms of each output as shown in below figure. A 4-to-16 decoder consists of 4 inputs and 16 outputs.

How many input lines does a decoder have?

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.