The Truth table of octal to binary encoder is shown below. The block diagram of octal to binary Encoder is shown in the following figure.Īt any time, only one of these eight inputs can be ‘1’ in order to get the respective binary code. Octal to binary encoder is nothing but 8 to 3 encoder. Octal to binary Encoder has eight inputs, Y 7 to Y 0 and three outputs A 2, A 1 & A 0. These OR gates encode the four inputs with two bits Octal to Binary Encoder The above circuit diagram contains two OR gates. The circuit diagram of 4 to 2 encoder is shown in the following figure. We can implement the above two Boolean functions by using two input OR gates. Inputsįrom Truth table, we can write the Boolean functions for each output as The Truth table of 4 to 2 encoder is shown below. The block diagram of 4 to 2 Encoder is shown in the following figure.Īt any time, only one of these 4 inputs can be ‘1’ in order to get the respective binary code at the output. Let 4 to 2 Encoder has four inputs Y 3, Y 2, Y 1 & Y 0 and two outputs A 1 & A 0. It is optional to represent the enable signal in encoders. Therefore, the encoder encodes 2 n input lines with ‘n’ bits. It will produce a binary code equivalent to the input, which is active High. It has maximum of 2 n input lines and ‘n’ output lines. An Encoder is a combinational circuit that performs the reverse operation of Decoder.
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