BCD to Excess-3 code

4-bit parity checker

1:4 DEMUX

1:8 DEMUX

1:4 DEMUX using 1:2 DEMUX

1:8 DEMUX using 1:4 DEMUX

4 Bit Parity generator

Half adder

Half subtractor

Full adder using basic gate

Full subtractor

2 bit comparator

2 bit comparator

4

Full adder using universal NAND gate

2- Bit Comparator

BCD adder using 4-bit binary adder

8:1 multiplexer

4:1MUX using 2:1 MUX

1 bit comparator

Half adder using universal NAND gate

Full subtractor using universal NAND gate

3 Bit Parity generator

Half subtractor using universal NAND gate

8:1 MUX using 4:1 and 2:1 MUX

Binary to gray code converter

Full Adder using DEMUX