FULL ADDER & FULL SUBTRACTOR using universal gates and circuitverse simulator

1. FULL ADDER & FULL SUBTRACTOR
using universal gates and circuitverse
simulator

2. FULL ADDER:
A full adder logic circuit has three inputs A, B and C, which
add the three input numbers and generate a carry and sum.
The difference between a half-adder and a full-adder is that
the full-adder has three inputs and two outputs, whereas half
adder has only two inputs and two outputs.

3. Truth TABLE & CIRCUIT DIAGRAM

4. Full adder using universal gates
Circuit diagram

5. K-map

6. APPLICATION
● ALU- Arithmetic Logic Unit (one of the circuit is a full adder).
● Ripple carry adder, it adds n-bits at a time.
● carryout Multiplication -the dedicated multiplication circuit uses it.
● For graphics related applications, where there is a very much need of
complex computations

7. FULL SUBTRACTOR
The full subtractor is a combinational circuit which is used to
perform subtraction of three input bits: the minuend ,
subtrahend , and borrow in . The full subtractor generates two
output bits: the difference and borrow out .

8. Truth TABLE & CIRCUIT DIAGRAM

9. Full subtractor using universal gates
Circuit diagram

10. K-map

11. APPLICATION
● These are generally employed for ALU in computers to subtract as CPU and
GPU for applications of graphics to decrease the circuit difficulty
● Subtractors are mostly used for performing arithmetical functions like
subtraction in electronic calculators and digital devices
● These are also applicable for different microcontrollers for arithmetic
subtraction, timers and program counter (PC)
● Subtractors are used in processors to compute tables, address, etc.