METHOD FOR MEASURING RESISTANCE VALUE OF CONVERSION RESISTANCE OF CURRENT MODE ANALOG /DIGITAL CONVERTER
A method for measuring the resistance value of the conversion resistance of a current mode analog/digital converter, involves keeping a current signal inputted to the current mode analog/digital converter constant (S11); obtaining a first digital quantity AD 0 transformed by the current mode analog/...
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Zusammenfassung: | A method for measuring the resistance value of the conversion resistance of a current mode analog/digital converter, involves keeping a current signal inputted to the current mode analog/digital converter constant (S11); obtaining a first digital quantity AD 0 transformed by the current mode analog/digital converter (S12); connecting a resistance R j , of which precision is higher than that of the conversion resistance R z of the current mode analog/digital converter, with the conversion resistance R z in parallel (S13); obtaining again a second digital quantity AD 1 transformed by the current mode analog/digital converter (S14); acquiring the resistance value of the conversion resistance R z by the following formula(I):
wherein, R 1 is the acquired resistance value of the conversion resistance R z , and R 2 is the resistance value of the resistance R j , of which precision is higher than that of the conversion resistance R z . The method can improve the precision of measuring and controlling the measured physical objects. |
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