A Parallel multiplier using approximate compressors are proposed in this paper. The two new approximate 4-2 compressors are proposes that the simplified compressors have better power consumption than the optimized 4-2 compressor existing designs. These approximate compressors are then used in the restoration module of a Parallel multiplier. Four different schemes for utilizing the proposed appr...

If compressor manifolds are thin compared to the shortest wavel~ngth of i:r:tt~rest, the gene!al procedure developed by the authors [1, 2] for the analysis of curved, t~l? gas cav1hes can be apphed to the analysis of gas pulsations in multi-cylinder compres~?r head cav1t1es. The procedure for smgle input single output systems is extended to systems of multl-mputs. Four pole parameters and trans...

A new type of compression mechanism named "Helical Compressor'' was presented at the Purdue Conference in 1992 and 1998 [Refs.1-2]. There they showed the design, performance of the prototype, theoretical analysis, and its potential. After that fundamental experiment and theoretical analysis have . clarified various phenomenon in the Helical Compressor. As a result, we can successfully achieve t...

A dynamic simulation model of a rolling piston type rotary compressor is developed to predict the dynamic characteristics of a variable speed compressor. The model is based on the principles of conservation, real gas equations, kinematics of the crankshaft and roller, mass flow loss due to leakage, and heat transfer. For the computer simulation of the compressor, the experimental data were firs...

In this article a low power and low latency 4-2 compressor has been presented. By using modified truth table and Pass Transistor Logic (PTL) a novel structure has been proposed which outperforms previous designs from the frequency of operation view point. The proposed design method has reduced the total transistor count considerably which will lead to reduced power consumption and smaller activ...

BACKGROUND An aerosol of budesonide inhalation suspension is delivered when used with various jet-nebulizer/compressor combinations. The constant introduction of new nebulizer/compressor combinations raises the question of whether the performance of these match the performance of existing devices. The aim of this study was to determine in vitro the inhaled mass and aerosol characteristics of bu...

The following paper describes the design and development issues with a variable capacity control 2-stage rolling piston compressor. The control mechanism was based on a gas-bypass control strategy. During the development, design issues surfaced that were not significant in the case of the full capacity version of the compressor. When the capacity was reduced, loss generation mechanisms remained...

This paper introduces the high efficiency of a horizontal rolling piston type compressor for household refrigerators. In the rolling piston type compressor, excessive compression loss and leakage loss largely affects the efficiency of the compressor. An experimental analysis of the following three items was made to determine that the performance characteristics of the compressor could be improv...

In recent years a number of mathematical models have been developed which simulate reciprocating compressor performance a·nd valve behaviour, Such a model (4), has been used with a 'complex' optimisation procedure to optimise the design of spring loaded ring plate valves in a reciprocating air compressor. Features of the procedure are discussed, such as the handling of constraints, the sensitiv...

Multiplication represents a fundamental building block in all DSP tasks. Due to the large latency inherent in multiplication, methods have been devised to minimize the delay. Two methods are common in current implementations: regular Arrays and Wallace trees. For higher order multiplications, a huge number of adders are to be used to perform the partial product addition. Reduction of adders by ...