Multiplexer(MUX) is a device that allows digital signals from several sources to be routed onto a single line of output. It has several input lines and a single output line. It has also data selector lines which specifies which input signal has to be switched to the output line. n data selector lines are required […]
An encoder is a combinational circuit that performs reverse function of a decoder. It accepts 2n input and produces output in n output lines. This process of generating codes based on the values of input lines is called encoding. 4 to 2 Line Encoder A 4 to 2 line encoder consists of 4 input lines
In BCD (Binary Coded Decimal), a binary pattern is used to represent a decimal number. A 7 segment display is used to display hexadecimal numeral by seven LEDs arranged in a definite pattern as shown in figure (a). A BCD to 7 segment decoder accepts the BCD code on its input and provide output to
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Decoders are the combinational circuits that detect the presence of some code on its input and indicate the presence of that code by a specified output. Generally, a decoder has n input lines and 2n output lines. Basic binary decoder Suppose we need to detect the occurrence of binary number 1100 on the input of
In a ripple carry adder, the carry from the previous stage should occur first to produce the sum and output carry of any stage. This causes a time delay in the addition process and is called propagation delay or ripple carry delay. The look-ahead carry addition is a method used to speed up the addition
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