Logic Gates
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Synchronous CounterWhat is a Counter?
A counter is a device which can count any particular event on the basis of how many times the particular event(s) is occurred. In a digital logic system or computers, this counter can count and store the number of time any particular event or process have occurred, depending on a clock signal. Most common type of counter is sequential digital logic circuit… |
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Asynchronous Counter An asynchronous counter (or ripple counter) is a sequential digital circuit in which the outputs of flip-flops are connected in series, so that the output of one flip-flop serves as the clock input to the next stage. Not all flip-flops may change state at the same time as synchronous counters, so asynchronous counters are easier to design but may experience propagation delays. Table of… |
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Full Subtractor Circuit Diagram and Its Construction In the previous tutorial of Half Subtractor Circuit, we had seen how computer use single bit binary numbers 0 and 1 for subtraction and create Diff and Borrow bit. Today we will learn about the construction of Full-Subtractor circuit. Full Subtractor CircuitHalf-Subtractor circuit has a major drawback; we do not have the scope to provide… |
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Multiplexer Circuit and How it Works The term Multiplexer which is also commonly called as “MUX” or “MPX” refers to selecting one output of the many available inputs. Professor Shankar Balachandran (IIT-M) explains multiplexing as the method of transmitting a large number of information units over a small number of channels or lines and a Digital Multiplexer is a combinational Logic circuit that selects binary… |
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Half Subtractor Circuit and Its Construction In previous tutorials, we have seen how computer use binary numbers 0 and 1 and by using an adder circuit computer will add those digits to provide SUM and Carry Out. We have already covered Half Adder and Full Adder circuits in previous tutorials. Today we will learn about Subtractor circuits. Subtractor circuits use this binary numbers 0, 1 and calculate the subtraction.… |
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Binary Decoders Decoder is type of combinational Circuit which decodes a small bit value into large bit value. It is normally used in combination with encoders which does exactly the opposite of what a decoder does, so read about Encoders here before you proceed with Decoders. Again just like Encoders there are many types of Decoders as well but the number of output lines in a decoder will… |
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Binary Encoders Encoders, as the name suggest, encodes a larger bit of information into a smaller bit value. There are many types of encoders based on the number of inputs and outputs and based on how it operates. But every Encoder has one underlying rule, the number of output lines on an Encoder will always be less than number of input lines. We will learn more about encoders, what is… |
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Half Adder Circuit Diagram and its Construction Computers use binary numbers 0 and 1. An adder circuit uses these binary numbers and calculates the addition. A binary adder circuit can be made using XOR and AND gates. The summation output provides two elements: the first one is the SUM, and the second one is the Carry Out. When we use the arithmetic summation process in our base 10 mathematics,… |
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Schmitt Trigger Gate Schmitt Trigger gate is a digital logic gate, designed for arithmetic and logical operations. It provides OUTPUT based on INPUT voltage level. A Schmitt Trigger has a THERSHOLD voltage level, when the INPUT signal applied to the gate has a voltage level higher than the THRESHOLD of the logic gate, OUTPUT goes HIGH. If the INPUT signal level is lower than THRESHOLD, the… |
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XNOR Gate XNOR or EX-NOR gate is a digital logic gate, designed for arithmetic and logical operations. Here we are going to use 74LS86 chip for demonstration, this chip has 4 EX-OR gates in it. These four gate are connected internally as shown in below figure. These EX-OR gates are followed by NOT gates. These gates provides… |
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NOR Gate NOR gate is a digital logic gate, designed for arithmetic and logical operations. This gate is mainly used in applications where there is a need for mathematical calculations. So in calculators, computers and many digital applications use this gate. Here we are going to use 74LS32 IC for demonstration, this chip has 4 OR gates in it. These four gate are connected internally… |
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AND Gate Circuit AND logic gate is a digital logic gate, designed for arithmetic and logical operations, every electronic student must have studied this gate is his/her career. This gate is mainly used in applications where there is a need for mathematical calculations. So in calculators, computers and manly digital applications use this gate. Here we are going to use IC 74LS09 for… |
