A TWO-STAGE DIGITAL AMPLIFIER APPLIED TO THE ARMY ARTIFICIAL HEART PUMP,

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A TWO-STAGE DIGITAL AMPLIFIER APPLIED TO THE ARMY ARTIFICIAL HEART PUMP,

Carl J Campagnuolo,Chris E. Spyropoulos,H. H. Straub-1964-04-30-Defense Technical Information Center (DTIC)

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TL;DRAbstract

A two-stage fluid amplifier was designed and evaluated for use with the army artificial heart pump. The stages were of the digital type, having preestablished characteristics, such that their cascaded output is applicable to the heart pump. Tests showed that the two-stage amplifier yields total pressure recoveries up to 50 percent. Output flows of the pump were considerably higher than those of a single-stage heart pump for similar input air pressures. However, the input air flow to the two-stage amplifier was also higher than that for the single amplifier. This high flow can be decreased by decreasing the nozzle areas of the two stages. (Author)

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A two-stage fluid amplifier was designed and evaluated for use with the army artificial heart pump. The stages were of the digital type, having preestablished characteristics, such that their cascaded output is applicable to the heart pump. Tests showed that the two-stage amplifier yields total pressure recoveries up to 50 percent. Output flows of the pump were considerably higher than those of a single-stage heart pump for similar input air pressures. However, the input air flow to the two-stage amplifier was also higher than that for the single amplifier. This high flow can be decreased by decreasing the nozzle areas of the two stages. (Author)

Keywords

AmplifierStage (stratigraphy)Direct-coupled amplifierOperational amplifierNozzleEngineeringElectrical engineeringMechanical engineering

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