Abstract
The circuit used to add the two numbers or two bits is adder. The main problem with the adder is both the area and delay to produce the final output. So, this paper implements an adder it requires a less amount of delay and area to produce the final output. The reduction of delay and area is done by the Parallel Prefix Adders. It plays a prominent role in Digital Combinational Circuits. Area and power are other factors which really makes the adder effective. The techniques used to get a less amount of delay and area is by using the Binary-to-Excess-1 Converter (BEC) and a Parallel Prefix Adder. The delay of the Modified Linear Carry Select Adder of Brent Kung Adder is less when compared with the Regular Carry Select Adder architecture. The delay and area further can be improved by using a Square root Carry Select adder. This paper focuses on operation of Parallel Prefix Adders of 32 bit Brent-Kung Adder. Keywords: And-Or-Inverter (AOI) Logic, Binary-to-Excess-1 Converter (BEC), Brent-Kung (BK) Adders, Carry Select Adder (CSLA), Parallel Prefix Adder
Highlights
Design of less consumed area, more accurate and fastest adder logic systems is a very important aspect in the VLSI
The summation and carry output mainly depends upon the delay i.e. no. of transistors present in a circuit, if the circuit occupies a less no of transistors one can said that the circuit has less delay and more area efficient
In digital circuits each and every component mainly depend upon the power and area, most of the circuits are made with less power and more area efficient
Summary
Design of less consumed area, more accurate and fastest adder logic systems is a very important aspect in the VLSI. One of the important components in the digital circuitry is the adder It performs an addition operation between two operands by bit-by-bit and generates a carry and sum. Of transistors present in a circuit, if the circuit occupies a less no of transistors one can said that the circuit has less delay and more area efficient. The summation and carry output mainly depends upon the delay i.e. no. This is one of the important aspects in any digital circuits. In digital circuits each and every component mainly depend upon the power and area, most of the circuits are made with less power and more area efficient
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