Title :
A DC current limited ammeter protection circuit
Author :
Smith, Charles E.
Author_Institution :
Dept. of Electr. Eng., Mississippi Univ., MS, USA
fDate :
2/1/1992 12:00:00 AM
Abstract :
Ammeters are always connected in series in the branch where a current is measured. Unfortunately, parallel connection can destroy a meter if connected by mistake, as often happens in introductory electric circuits instructional laboratories. To protect an ammeter from excessive currents caused by parallel connection, an op-amp/Zener diode circuit has been designed to effectively operate as a current-limited ammeter
Keywords :
Zener diodes; ammeters; limiters; operational amplifiers; overcurrent protection; DC current limited ammeter protection circuit; introductory electric circuits instructional laboratories; op-amp/Zener diode circuit; Accidents; Ammeters; Circuits; Current measurement; Diodes; Laboratories; Operational amplifiers; Protection; Radiofrequency amplifiers; Voltage;
Journal_Title :
Education, IEEE Transactions on
