2-bit comparator

4-bit Serial Adder

T Flip-Flop

1-bit Serial Adder

Right Shift Register [SIPO]

D flip flop and T flip flop

SR Flip Flop

4:2 Encoder

2-Bit comparator(less than operation)

4bit Binary to 4bit Gray Code

4:1 Mux using Logic Gates

2 bit Comparator

8:1 MUX using Logic Gates

4-bit Odd/Even

JK Flip Flop

4-bit Subtractor using Parallel Adder and XOR Gates

Even parity generator

4*1 MUX

4 bit Even Parity Checker circuit

SIPO Shift Register

4-bit Asynchronous Down counter

Figure 4.2 A serial binary adder

4-bit Odd Parity Checker

1x4 Demultiplexer

3 to 8 Line Decoder

4-bit Asynchronous Up counter

8-bit parallel Adder

4- bit EP Checker circuit

Full Adder using 2, 4*1 MUX

4-Bit BCD Adder

XOR using NOR gates

Full Adder using Logic Gates

4- BCD ADDER

Shift Register - SIPO mode

74HC161