DIE BONDINGProcess of mounting a chip to a package .
DIELECTRICAn insulator; a term applied to the insulating material between the plates of a capacitor
DIELECTRIC CONSTANTThe ratio of a given dielectric to the dielectric value of air  .
DIELECTRIC FIELDThe space between and around charged bodies in which their influence is felt.
Also called ELECTRIC FIELD OF FORCE or an ELECTROSTATIC FIELD .
DIELECTRIC HEATINGThe heating of an insulating material by a high-frequency electric field .
DIELECTRIC HYSTERESIS LOSSPower loss of a capacitor because of the changes in orientation of
electron orbits in the dielectric; the changes in orientation are caused by rapid reversal in polarity of line
voltage. The higher the frequency, the greater the loss .
DIELECTRIC LEAKAGEPower loss of a capacitor because of the leakage of current through the
dielectric. Also relates to leakage resistance; the higher the leakage resistance, the lower the dielectric
DIELECTRIC LOSSESThe losses resulting from the heating effect on the dielectric material between
conductors  .
DIELECTRIC STRENGTHThe ability of an insulator to withstand a potential difference without
breaking down (usually expressed in terms of voltage) .
DIFFERENCE FREQUENCYSee BEAT FREQUENCY .
DIFFERENCE OF POTENTIALA voltage between two points .
DIFFERENTIAL AMPLIFIERA circuit that amplifies the difference between two input signals .
DIFFRACTIONThe bending of waves (as light or RF) when the waves are met with some form of
DIFFUSION(1) The scattering of reflected light waves from an object, such as white paper . (2)
Controlled application of impurity atoms to a semiconductor substrate .
DIGITA symbol that represents one of the nonnegative integers smaller than the radix. For example, in
decimal notation a digit is one of the characters from 0 through 9 .
DIGITAL COMPUTER(1) A computer in which discrete representation of data is used. (2) A computer
that operates on discrete data by performing arithmetic and logic processes on these data .
DIODEAn electron tube containing two electrodes: a cathode and a plate . (2) A two element, solid-
state device made of either germanium or silicon; it is primarily used as a switching device  .
DIODE DETECTORA demodulator that uses one or more diodes to provide a rectified output with an
average value that is proportional to the original modulation  .
DIPOLEA common type of half-wave antenna made from a straight piece of wire cut in half. Each half
operates at a quarter wavelength of the output .
DIRECT CURRENTAn electric current that flows in one direction only .