An adder-subtractor is a circuit capable of subtracting or adding binary numbers. The application of a 4-bit adder and subtractor is for use as part of the core of an ALU, or arithmetic logic unit.
January 4, 2011
TTL refers to Transistor Transistor Logic, an electronic component standard where a logical 0 is 0 volts and a logical 1 is 5 volts. BCD refers to Binary Coded Decimal. This is an encoding scheme where each bit represents a value and after the value reaches 9 the count is reset and a carry bit is formed. Bit 0 is 0,1 Bit 1 is 0 and 2, bit 3 is 0 and 4, bit 4 is 0 and 8. As an example the decimal digit 7 is encoded as 1110 or 1+2+4.
nibble is in electronic equal 4 bit nibble=4bit
It is quite simple, you have to draw a truth table. Derive K-Maps from there and you would have the equations. I am assuming you do know how to solve simple combinational design problems
A 32 bit data bus can send out 4 bytes at a time and can take in 2^32 in addressable memory
The 7483 is a 4 bit full adder and a 0 on C will make it act as a subtractor
IC 7483 is a 4-Bit Full Adder Circuit.
IC 7485 (a comparator) can be used as a subtractor, this is because...... as a 4-bit subtractor calculates the difference between the inputs and then provides value for a borrow and a difference.....in the same way a 4-bit comparator (in this case IC 7485) takes the inputs compares it and gives a corresponding value either A>B or A=B or A
10 ANd and 4 Or gate..
I wants to know the advantages of 4 Bit BCD/Binary UP/DOWN
The 1 bit full adder has three inputs, A, B, and CarryIn. It has two outputs, Result and CarryOut. To connect multiple 1 bit full adders together, bus the A and B inputs into their respective buses, bus the Result outputs into its bus, connect the low order bit's CarryIn to LogicFalse, and daisy chain each bit's CarryOut into the next bit's CarryIn. Use the last bit's CarryOut as overall CarryOut.
4 full adders will be used BCD is a 4 bit code. Each bit of the BCD number will be an input of each full adder. input 1 in first FA. 1 in second and 0 in the last to FA's
A full adder takes two inputs plus carry in and produces one output plus carry out. You need four full adders to add two 4 bit words. (No half adders required.)Or: for the lowest bit you can use a half-adder (no input carry).
i have the same question. please some1 answer it...
20
By connecting four complete adders that run a distance at two equal amounts to one another and with a numbering range of 0-15 a 4 bit parallel can be fully implemented.
=HA#0-=FA#1-=FA#2-=FA#3-=FA#4-=FA#5-=FA#6-=FA#7=It consists of seven Full-Adder and one Half-Adder, has 2*8 input lines and 9 output line (8+carry).