A new high speed, low power adder; using hybrid analog-digital circuits

Author(s):  
Nima Taherinejad ◽  
Adib Abrishamifar
Author(s):  
M. Anitha ◽  
J.Princy Joice ◽  
Rexlin Sheeba.I

Adders are of fundamental importance in a wide variety of digital systems. This paper presents a novel bit block structure which computes propagate signals as carry strength. Power consumption is one of the most significant parameters of carry select adder.The proposed method aims on GDI(Gate Diffusion Input) Technique. Modified GDI is a novel technique for low power digital circuits design further to reduce the swing degradation problem. This techniques allows reduction in power consumption, carry propagation delay and transistor count of the carry select adder.This technique can be used to reduce the number of transistors compared to conventional CSLA and made comparison with known conventional adders which gives that the usage of carry-strength signals allows high-speed adders to be realised at lower cost as well as consuming lower power than previous designs. Hence, this paper we are concentrating on the area level &we are reducing the power using modified GDI logic.


1989 ◽  
Vol 36 (11) ◽  
pp. 2601-2602 ◽  
Author(s):  
C.W. Farley ◽  
M.F. Chang ◽  
P.M. Asbeck ◽  
K.C. Wang ◽  
N.H. Sheng ◽  
...  

Power is a major constraint in Digital VLSI circuits, due to reduction in sizes of Metal Oxide Semiconductor (MOS) transistors are scaling down. Low-power technologies are used to diminish the power utilization be able to be classified as Sub-threshold CMOS and Adiabatic logic tachniques. In, Sub-threshold CMOS defines a system which reduces the power utilization to inferior than the threshold voltage of a MOS Device, where as Adiabatic logic circuit is a method which minimizes the energy usage through suppress the applied voltage to the resistance of a given VLSI design. This effort deals to offer a subthreshold adiabatic logic circuit of low power CMOS circuits that uses 2φ clocking subthreshold Adiabatic Logic. The digital circuits were designed in HSPICE using 0.18 μm CMOS standard process technology. It is evident from the results that the 2φ Clocking Subthreshold Adiabatic design is beneficial in major application where power starving is of major significance at the same time as in elevated its performance efficiency in DSP processor IC, System on chip, Network on chip and High speed digital ICs.


2011 ◽  
Author(s):  
Tauseef Tauqeer ◽  
J. Sexton ◽  
Muhammad Mohiuddin ◽  
M. Missous

Author(s):  
Merrin Mary Solomon ◽  
Neeraj Gupta ◽  
Rashmi Gupta

Full adder is an important component for designing a processor. As the complexity of the circuit increases, the speed of operation becomes a major concern. Nowadays there are various architectures that exist for full adders. In this paper we will discuss about designing a low power and high speed full adder using Gate Diffusion Input technique. GDI is one of the present day methods through which one can design logical circuits. This technique will reduce power consumption, propagation delay, and area of digital circuits as well as maintain low complexity of logic design. The performance of the proposed design is compared with the contemporary full adder designs.


Sign in / Sign up

Export Citation Format

Share Document