Voltage test device

The invention discloses a voltage testing device, which comprises a board main body and a plurality of testing circuits, wherein each testing circuit comprises a measuring point, a first variable resistor, a second variable resistor, a first operational amplifier, a second operational amplifier and...

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Bibliographic Details
Main Authors HU KEYOU, HE FENGLONG
Format Patent
LanguageChinese
English
Published 29.04.2009
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention discloses a voltage testing device, which comprises a board main body and a plurality of testing circuits, wherein each testing circuit comprises a measuring point, a first variable resistor, a second variable resistor, a first operational amplifier, a second operational amplifier and an alarming module; the measuring point is connected with the non inverting input end of the first operational amplifier and the inverting input end of the second operational amplifier; the output end of the first operational amplifier is connected with a voltage source through the alarming module; the output end of the second operational amplifier is connected with the voltage source through the alarming module; the voltage source is connected with the non inverting input end of the second operational amplifier through the first variable resistor and connected with the inverting input end of the first operational amplifier through the second variable resistor, sets a voltage upper limit value for the inverting inp
Bibliography:Application Number: CN20071202238