Half adder and full adder

Half adder and full adder verification using ltspice outputs and truth table using k-map.

1. ExperimentNo.3
OBJECTIVE:-VerificationofHalfAdderandFullAdderusingbasicgatesanduniversalgates.
APPARATUSREQUIRED:-LTSpice
THEORY:-Amultiplexer,alsoknownasadataselector,isadevicethatselectsbetweenseveral
analogordigitalinputsignalsandforwardsittoasingleoutputline.Itiscombinationallogicnetwork
whichhas2
n
inputs,nselectlinesandhasonlyoneoutput.
Amultiplexerofinputshasselectlines,whichareusedtoselectwhichinputlinetosendtothe
output.Multiplexersaremainlyusedtoincreasetheamountofdatathatcanbesentoverthenetwork
withinacertainamountoftimeandbandwidth.
Multiplexersarealsoknownas“Datanselector,paralleltoserialconvertor,manytoonecircuit,
universallogiccircuit”.
Fig1:Blockdiagramofhalfadder Table1:Truthtableofhalfadder
INPUTS OUTPUTS
A B SUM CARRY
0 0 0 0
0 1 1 0
1 0 1 0
1 1 0 1
A B Cin S Cout
0 0 0 0 0

2. Fig2:BlockdiagramofFulladder Table2:Truthtableoffulladder
0 0 1 1 0
0 1 0 1 0
0 1 1 0 1
1 0 0 1 0
1 0 1 0 1
1 1 0 0 1
1 1 1 1 1

3. CIRCUITDIAGRAM&OUTPUTS:-
1-HalfAdder
Fig-3CircuitdiagramofhalfadderusingXOR
Fig-4OutputofhalfadderusingXOR

4. 2-HalfAdderusingNAND
Fig-5CircuitofhalfadderusingNAND
Fig-6OutputofhalfadderusingNAND

5. 3-HalfAdderusingNORGate
Fig-7CircuitofhalfadderusingNOR
Fig-8OutputofhalfadderusingNOR

6. 4-FullAdder
Fig-9CircuitofFulladderusingXOR
Fig-10OutputofFulladderusingXOR

7. 5-FullAdderusingNAND
Fig-11CircuitofFulladderusingNAND
Fig-12OutputofFulladderusingNAND

8. 6-FullAdderusingNORGate
Fig-13CircuitofFulladderusingNOR

9. Fig-14OutputofFulladderusingNOR
Applications:
1.Multiplexerisusedincommunicationsystemstoincreasetheefficiencyofthecommunication
systembyallowingthetransmissionofdata,suchasaudio&videodatafromdifferentchannels
viacablesandsinglelines.
2.Itisusedincomputermemory.
3.Itisusedintelephonenetworkstointegratethemultipleaudiosignalsonasinglelineof
transmission.