This paper considers two types of n-bit adders, ripple carry adders and cascaded carry look-ahead adders, with minimum tests for stuck-at fault models. In the first part, we present two types of full adders consisting of five gates, and show their minimality. We also prove that one of the full adders can be tested by only three test patterns for single stuck-at faults. We also present two types...

This paper presents a merged multiplyaccumulate (MAC) hardware that is based on the modified Booth algorithm. The carry-save method is used in the Booth encoder, the Booth multiplier, and the accumulator sections to guarantee the fastest possible. By combining multiplication with accumulation and devising a hybrid type of carry save adder (CSA), the performance was improved. Also, the proposed ...

This paper presents a highly area-efficient CMOS carry-select adder (CSA) with a regular and iterative-shared transistor structure very suitable for implementation in VLSI. This adder is based on both a static and compact multi-output carry look-ahead (CLA) circuit and a very simple select circuit. Comparisons with other representative 32-bit CSAs show that the proposed adder reduces the area b...

This paper presents a merged multiplyaccumulate (MAC) hardware that is based on the modified Booth algorithm. The carry-save method is used in the Booth encoder, the Booth multiplier, and the accumulator sections to guarantee the fastest possible. By combining multiplication with accumulation and devising a hybrid type of carry save adder (CSA), the performance was improved. Also, the proposed ...

The terahertz optical asymmetric demultiplexer (TOAD) or semiconductor amplifier (SOA)-assisted Sagnac switches have been used to construct an all-optical 4-bit carry skip adder. This design aims satisfy the high speed and accuracy requirements of modern ultrafast digital transmission. Using a combination multiplexer full adder, we describe When compared ripple adder look-ahead may be employed ...

This paper presents a merged multiplyaccumulate (MAC) hardware that is based on the modified Booth algorithm. The carry-save method is used in the Booth encoder, the Booth multiplier, and the accumulator sections to guarantee the fastest possible. By combining multiplication with accumulation and devising a hybrid type of carry save adder (CSA), the performance was improved. Also, the proposed ...

This paper presents a merged multiplyaccumulate (MAC) hardware that is based on the modified Booth algorithm. The carry-save method is used in the Booth encoder, the Booth multiplier, and the accumulator sections to guarantee the fastest possible. By combining multiplication with accumulation and devising a hybrid type of carry save adder (CSA), the performance was improved. Also, the proposed ...

Addition forms the basic structure for many processing operations like counting, multiplication, filtering etc. Adder circuits that add two binary numbers are of great interest for many designers. The simplest approach to design an adder is to implement gates to yield the required logic function. Carry-look ahead adder is a major functional block in arithmetic logic unit due to its high speed o...

This research aims to fill up the gap in energy-efficient transistor-level wide word-length carry circuit generator by using ripple (RC) and look-ahead (CLA) method-based hybrid 4-bit generation process for carry-select adder (CSLA). Compared existing CLA architectures, proposed RC-CLA showed performance improvement terms of power delay product (PDP). Later, architectures (existing proposed) we...

this paper presents a modified 32-bit rom-based direct digital frequency synthesizer (ddfs). maximum output frequency of the ddfs is limited by the structure of the accumulator used in the ddfs architecture. the hierarchical pipeline accumulator (hpa) presented in this paper has less propagation delay time rather than the conventional structures. therefore, it results in both higher maximum ope...