removed redundant data and made alu.md prettier (CircuitVerse#300)

docs/alu.md

@@ -22,10 +22,10 @@ nav_order: 9
 ## Introduction
 An arithmetic logic unit (ALU) is a digital circuit used to perform arithmetic and logic operations. It represents the fundamental building block of the central processing unit (CPU) of a computer. Modern CPUs contain very powerful and complex ALUs. In addition to ALUs, modern CPUs contain a control unit (CU).
 
-The purpose of the ALU is to perform mathematical operations such as addition, subtraction, multiplication and division. Additionally, the ALU processes basic logical operations like AND/OR calculations. Also known as the arithmetic logic unit, it serves as the computational hub of the Central Processing Unit (CPU) for a computer system
+The purpose of the ALU is to perform mathematical operations such as addition, subtraction, multiplication and division. Additionally, the ALU processes basic logical operations like AND/OR calculations. It serves as the computational hub of the Central Processing Unit (CPU) for a computer system
 
 ## In Detail
-So with the above building blocks i.e. half adder and full adder discussed in Combinational Analysis, lets construct a simple ALU that performs a arithmetic operation (1 bit addition)and does 3 logical operations namely AND, NOR and XOR as shown below. The multiplexer selects only one operation at a time. The operation selected depends on the selection lines of the multiplexer as shown in the truth table.
+So with the above building blocks i.e. half adder and full adder discussed in Combinational Analysis, lets construct a simple ALU that performs a arithmetic operation (1 bit addition) and does 3 logical operations namely AND, NOR and XOR as shown below. The multiplexer selects only one operation at a time. The operation selected depends on the selection lines of the multiplexer as shown in the truth table.
 
 <div style="text-align:center" ><img src="../assets/images/1bitALU.jpg" /></div>
 
@@ -45,13 +45,13 @@ Now we can take up the 1 bit ALU as block and construct a 4 bit ALU, which perfo
 <div style="text-align:center" ><img src="../assets/images/360px-4BITALU.jpg" /></div>
 
 There are a few important takeaways here:
-* The selection lines MO and M1 select the function ALU performs. These selection lines combined with the input arguments and desired functions a Instruction Set can be formed.
-* These Instructions can used to create meaningful programs. Since these are required to be easily available they can be stored on ROM unit.
+* The selection lines MO and M1 select the function ALU performs. These selection lines combined with the input arguments and desired functions, an Instruction Set can be formed.
+* These Instructions can used to create meaningful programs. Since these are required to be easily available, they can be stored on ROM unit.
 * The input arguments A and B are often stored in Internal Registers. These along with other special purpose register form the registers of the microcontroller.
 * ROM memories are slower in speed, hence an intermediate high speed RAM is often used.
-* All the critical timings, decoding of the instructions are often grouped together in seperate control and timings unit'
-* If a Micro controller would be constructed only from ALU, RAM, ROM there would not be any external interface. Hence we have Input/Output IO ports.
-* Additional features such as 'Interrupts, communication protocols, EEPROM, Timers/Counters, Debug interfaces etc are incorporated to make a controller complete.
+* All the critical timings, decoding of the instructions are often grouped together in seperate control and timings unit.
+* If a Micro controller would be constructed only from ALU, RAM and ROM, there would not be any external interface. Hence we have Input/Output (I/O) ports.
+* Additional features such as Interrupts, communication protocols, EEPROM, Timers/Counters, Debug interfaces etc. are incorporated to make a controller complete.
 
 In above discussion we might have left out intricate details involved in a ALU, CPU design. But the aim was to understand ALU/CPU at a deeper level.