Total 64 combinations will occure in input.
The combinational logic circuits are a type of logic circuits containing only logic gates (AND, OR, XOR, NOT, NAND, NOR) and its output only depends on the current input (do not have memory).
multiplexer
A XNOR gate for comparing 2 inputs
A logic gate is an elementary building block of a digital circuit. Most logic gateshave two inputs and one output. ... The following illustration and table show the circuit symbol and logic combinations for an AND gate. (In the symbol, the input terminals are at left and the output terminal is at right.)
A sequential circuit is a type of logic circuit. It sends an output that is dependent upon the present input in addition to the history of the input. That makes it different from a combinational circuit, whose output depends solely on the present input. Given their reliance on input history (or stored input), sequential circuits are particularly useful in computer random access memory (RAM). The two types of sequential circuits are synchronous circuits and asynchronous circuits.
All inputs hae to be low i.e 0.
I've seen a Logic chip, 2 input quad NAND gate IC, that was set up as a Audio amplifier circuit.
Sequential Logic circuits are a type of logic circuits in which its output depends on the current and last input (memory). a digital circuits that contain filp-flop is called as sequential ckt because its output at any time depend not only on its current input but also past sequence memory of past event.
first create truth table, inputs should be combination of 3 bits i.e 8 possible combination. the outputs are the square of each input. you need 6 bits for the outputs since the square of 7 is 49 which is binary notation 49 is (110001) hence 6 bits. same goes for the other inputs. when the table is complete. find the Boolean function that drives each bit, preferably by K-maps to minimize the logic. Then from the equations, simply draw the circuit by using the necessary logic gates. There will be 3 inputs and 6 outputs for the overall circuit. Very easy but tedious. have fun
Use two NOR gates. Tie the output of the first to both (or all) inputs of the second. A logic one at any input of the first produces a logic one at the output of the second which is a standard OR.
TTL - transistor-transistor logic uses connections between transistors to perform logic functions, rather than connections using resistors or diodes.T - transistor input stage (logic section)T - transistor output stage (power gain section)L - logicEarlier logic families like DTL (D - diode input stage) and RTL (R - resistor input stage) used different components in the input circuit and simpler output circuits.Later logic families like IIL (Integrated Injection Logic) and CMOS (Complimentary Metal Oxide Semiconductor) used entirely different circuits without separating into input (logic) and output (power gain) stages and significantly reduced power consumption, making dramatically higher levels of integration practical.
A positive logic system will output true only when the input is true. A negative logic system will output true only when the input is false. The NOT logic gate is an example of a negative logic system. That is, NOT( false ) will output true.