Title :
High current injection effects of the switching JFETs in the current electrometers
Author :
Rajput, S.S. ; Garg, S.C.
Author_Institution :
Radio Sci. Div., Nat. Phys. Lab., New Delhi, India
fDate :
2/1/1996 12:00:00 AM
Abstract :
The performance of JFET as a switch in the feedback loop of a multigain ranging current electrometer is described. The study indicates that the electrometer starts departing from linear behavior as the input current becomes comparable to the drain saturation current of the JFET. It is shown that the nonlinearity in the electrometer behavior is attributable to the variations occurring in the ON resistance and gate current of the JFET
Keywords :
circuit feedback; electric current measurement; electrometers; field effect transistor switches; transducers; ON resistance; current to voltage transducer; drain saturation current; feedback loop; gate current; high current injection effects; linear behavior; multigain ranging current electrometer; nonlinearity; switch; switching JFET; variations; Area measurement; Atmospheric measurements; Current measurement; Dynamic range; Electric resistance; Feedback; Leakage current; Particle measurements; Switches; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
