串行加法器和并行加法器的区别

1. 串行加法器：
串行加法器用于将两个二进制数以串行形式相加。两个要串行相加的二进制数存放在两个移位寄存器中。该电路在一个全加器的帮助下一次添加一对。全加器的进位输出应用于 D 触发器，其输出随后用作下一对有效位的进位输入。然而，来自全加器输出的和位 S 可以传输到第三个移位寄存器中。

2. 并行加法器：
并行加法器是将两个二进制数以并行形式相加的组合数字电路。它由级联的全加器组成，每个全加器的输出进位连接到下一个全加器的输入进位。

串行加法器和并行加法器的区别：

Serial Adder	Parallel Adder
It is used to add two binary numbers in serial form.	It is used to add two binary numbers in parallel form.
A serial adder uses shift registers.	A parallel adder uses registers with parallel loads.
It requires single full adder.	It requires multiple full adders.
Carry flip-flop is used in serial adder.	Ripple carry adder is used in parallel adder.
Serial adder is a sequential circuit.	Parallel adder is a combinational circuit.
In serial adder, propagation delay is less.	In parallel adder, propagation delay is present from input carry to output carry.
Number of required full adder is fixed i.e. one.	Number of required full adder is equal to the number of bits in the binary number.