Glossary of Electronic Terms, Electronic terms starting from alphabet J


 
JITTER.
Jitter is the difference [deviation] between the expected occurrence of a signal edge and the time the edge actually occurs [phase variation]. Jitter may also be expressed as the movement of a signal edge from its ideal position in time [the expected position]. Abrupt and unwanted variations of one or more signal characteristics, such as the interval between successive pulses, the amplitude of successive cycles, or the frequency or phase of successive cycles.

JUNCTION BOX.
A box with a cover that serves the purpose of joining different runs of wire or cable and provides space for the connection and branching of the enclosed conductors.


Junction diode.
A semiconductor diode in which the rectifying characteristics occur at a junction between the n-type and p-type

J
A prefix used to indicate an imaginary number. (Operator j)

Jack
Socket or connector into which a plug may be inserted.

JFET
Abbreviation for "Junction field effect transistor".

Joule
The unit of work and energy.

Junction
Contact or connection between two or more wires or cables. The area where the p-type material and n-type material meet in a semiconductor.