Transcript: What are logic gates? An NAND gate will give a high output (1) in all scenarios unless both inputs are high . The Or Gate The And Gate There are seven basic logic gates: AND, OR, XOR, NOT, NAND, NOR, and XNOR. A logic gate is one of the main building blocks of a digital circuit. Majority of logic gates have only two inputs and one output. Electronic logic: digital and analogue signals Logic gates allow an electronic system to make a decision based on a number on its inputs. This means that each input and output of the gates must be one of two things, Either high, commonly referred to as on (1) and low which is commonly known as off (0) Logic Statements The Xor Gate is similar to an OR gate however with minor differences. The output of the Xor Gate is only high (1) if only one of the two inputs is high (1). If both inputs are the same ex. Low, Low (0,0) or High, High (1,1) then the output would be low (0) The NOR Gate The Not Gate What Are Truth Tables? A Nor gate will give a high output (1) if both inputs are low (0) . ex if there were 2 inputs that were low (0) then it would make the output high A logic gate truth table represents the possible input combinations of the logic gate/circuit which determines the output depending on the combination of the outputs and the gate that is being used. Each logic gate has its own unique truth table with different combinations which result in different outputs A not gate is different to the others. this is due to it only containing one input. It will give a high output if the input is low. The Xor Gate The Nand Gate The XOR (Exclusive Or) An Or gate will give a high output (1) if any of the inputs are high. ex if there was at least one input that was high (1) then it would make the output high as well This gate is similar to an OR gate but the output is only high if only one of the two inputs is high Logic Gates An AND gate will give a high output (1) only if all of the inputs are high. ex if there 2 inputs that were both 1, it would give an output of 1
Transcript: sometimes referred to by its extended name, Negated AND gate. is a digital logic gate with two or more inputs and one output with behavior that is the opposite of an AND gate. NOR Gate is a digital logic gate with two or more inputs and one output with behavior that is the opposite of an OR gate. Process Logic Gate Inverters OR Gates AND Gates NOR Gates NAND Gates Exclusive Gates legend: A = input 1 B = input 2 Q = output Vss = ground (-) Vdd = supply (+) NAND Gate produces a LOW output of 0 only when all inputs are HIGH at 1. NAND Gate Results legend: A = input 1 B = input 2 Q = output Vss = ground (-) Vdd = supply (+) sometimes referred to by its extended name, Negated OR gate. A NOR Gate produces a LOW output of 0 when any of the inputs is HIGH at 1. LOGIC GATES is a circuit that has one or more input signals but only one output signal. Please, do get a pen, keep all your notes and don't cheat..
Transcript: Inverts a single input, if input is True, output is False. If input is False, output is True Jason Ness Lakewood HS Output True when both input A and input B are the same values. Output False when input A and input B are different values. Output True when either input A or input B are True. Output False when both input A and input B are False. Output True when either input A or input B are False. Output False when both input A and input B are True. And one more thing... It's logical, don't you agree Output True when both input A and input B are true. Output False when either input A or input B are False. NAND XOR AND Conclusion NOR Output True when Both input A and input B are False. Output False when either input A and input B are True. NOT Logic Gates OR XNOR is here Output True when input A and input B are different values. Output False when input A and input B are the same value.
Transcript: Fire Alarm Security system OR Gate Logic Gates The inverse of the AND gate's results is produced. The output can only be high if both the inputs are not high. By: Sneha, Ananya, Saleema Using a Gate Automatic Fan Control Using a Gate NOR Gate Using a Gate Security Alarm Street lights NOT or Inverter Gate NAND Gate The inverse of the OR gate's result is produced. The output can only be high if both the inputs are low. For the output to be high, Input A and Input B must be high. AND Gate Using a Gate Intro A truth table gives the result of all the possible switch settings. It uses two logic numbers: 0 for OFF and 1 for ON. Logic Gates work electronically using tiny transistors as switches. They are made as Integrated Circuits (IC), with each chip holding several gates. The chip needs a DC power supply. Typically, this is a 5 volt supply. Gates can be combined so that the output of one becomes the input of another. For most practical applications, combinations of gates are needed. In this gate, only one input is required. It provides the inverse of the input so if the input A is high, output Q is low. Unless both Input A and Input B are low, the output will always be high.
Transcript: XOR gate TTL - transistor-transistor logic - this technology supplanted DTL technology with observation that one transistor can replace two diodes with higher speed and using only half the space CMOS - complementary metal–oxide–semiconductor - to reduce size and power consumption the bipolar transistors have been replaced by complementary field-effect transistors (MOSFETs) AND gate Charles Sanders Peirce Technical classification: NOT gate Thank You for listening. described in a 1886 letter, how logical operations could be carried out by electrical switching circuits History introduced the use of Boolean algebra in the analysis and design of switching circuits in 1937 Nikola Tesla Types of logic gates Logic gates Types of logic gates A logic gate is an idealized or physical device implementing a Boolean function, that is, it performs a logical operation on one or more logic inputs and produces a single logic output. Harvard Mark I - electro-mechanical digital computer built from relays Technical classification: OR gate RTL - resistor-transistor logic - the simplest family of logic gates using bipolar transistors and resistors Implementation of logic gates Walther Bothe Maya II - a computer created from logic gates which has been made out of DNA, it can play a complete game of tic-tac-toe with human opponent Starting in 1898, Nikola Tesla filed for patents of devices containing electro-mechanical logic gate circuits Bartosz Radomski The first modern AND gate was made in 1924 by DTL - diode-transistor logic - resistors from RTL was replaced by diodes for higher speed Parts of presentation Claude Elwood Shannon Logic gates are primarily implemented using diodes or transistors acting as electronic switches, but can also be constructed using electromagnetic relays, fluidic logic, pneumatic logic, optics, molecules, or even mechanical elements. What is a logic gate Logic classification: Types of logic gates What is a logic gate History of logic gates Types of logic gates Implementation of logic gates
Transcript: NAND * This gate is equal to the DNA but is denial. * This consists of an AND gate with a NOT gate (denying) the exit. * With that you get a "0" when all inputs are "1" and "1" when all its inputs are "0". * The circle at its output is symbolizing the denial, reverse all your outputs "1". * This gate is one of the most basic. * Is your boolean function is multiplication and serial connection is made. * Its truth table shows each time one of its inputs is a "0" your output will be "0" (low), so its two inputs must be "1" so its output is "1" (High ). B GATE NOR logic gates symbol A AND GATE OR A A * Basic gate, his Boolean function is the sum, runs parallel connection. * His condition is "1" every time one or both inputs is set to "1". A Symbol NOT GATE NOT GATE AND * This basic gate allows its output is opposite its entrance. * Boolean function characterized by denial, only has one input and one output. OR Thanks for your attention that are? Symbol B Symbol They are electronic devices with a Boolean function. NOR A x B GATE NAND * The NOR gate is the denial of a further OR gate NOT (reverse) gate. Ie if its output is '1' to be denied his departure should become '0'. This is why it is called the inverter gate There are different types of gates: A + B Symbol
Transcript: OR Gate Logic Gates The NOT gate is an electronic circuit that produces an inverted version of the input at its output. It is also known as an inverter. If the input variable is A, the inverted output is known as “NOT A”. This is also shown as A', or A , as shown at the outputs. The diagrams below show two ways that the NAND logic gate can be configured to produce a NOT gate. The AND gate is an electronic circuit that gives a high output (1) only if all its inputs are high. A dot (.) is used to show the AND operation i.e. A.B. Bear in mind that this dot is sometimes omitted i.e. AB The 'Exclusive-OR' gate is a circuit which will give a high output if either, but not both, of its two inputs are high. An encircled plus sign (⊕) is used to show the EOR operation. NAND Gate AND Gate XNOR Gate This is a NOT-AND gate which is equal to an AND gate followed by a NOT gate. The outputs of all NAND gates are high if any of the inputs are low. The symbol is an AND gate with a small circle on the output. The small circle represents inversion NOT Gate The 'Exclusive-NOR' gate circuit does the opposite to the EOR gate. It will give a low output if either, but not both, of its two inputs are high. The symbol is an EXOR gate with a small circle on the output. The small circle represents inversion. XOR Gate The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation
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