Class DAmplifiers where the output is a switching waveform, at a frequency far higher than the highest audio signal that needs to be reproduced.
Class GAmplifiers that are similar to class AB amplifiers except they use two or more supply voltages.
Class HAmplifiers that modulate the supply voltage to the amplifier output devices so that it is never higher than necessary to support the signal swing.
Common-ModeSignals that are identical in amplitude and phase at both inputs; the potential or voltage that exists between neutral and ground.
Common-Mode CurrentUnbalanced current (current not returned) within a cable.
Common-Mode Noise/InterferenceInterference that appears on both signal leads (signal and circuit return), or the terminals of a measuring circuit, and ground.
Common-Mode SignalsIdentical signal components on both the + and - inputs of a differential amplifier or instrumentation amplifier (i.e. balanced pair).
Conducted EmissionsRadio frequency current that flows on one or more conductors connected to an electric circuit, or alternatively, radio frequency voltage between conductors connected to an electric circuit.
Conducted Susceptibility / Conducted ImmunityAbility of an electronic circuit, a piece of equipment, or a subsystem or system to operate acceptably when subjected to radio frequency voltage or current on interconnecting conductors.
Cross ModulationElectrical intermodulation in which there are produced frequencies equal to the sums and differences of a desired and an undesired frequency or of their harmonics.
CrosstalkUnwanted signals in a communication channel (as in a telephone, radio, or computer) caused by transference of energy from another circuit (as by leakage or coupling).
Current ProbeAn electrical device that can measure amperage without breaking a circuit. Current probes sense the current flowing through a conductor and convert it to a voltage that can be viewed and measured on an oscilloscope.
Data Acquisition SystemSystem which acquires data, generally by digitizing analog channels and storing the data in digital form. These systems can be standalone or married to a computer and can acquire multiple channels of data.
DAQSystem which acquires data, generally by digitizing analog channels and storing the data in digital form. These systems can be standalone or married to a computer and can acquire multiple channels of data.
dBmA unit that defines a signal level by comparing it to a reference level. The reference level of 0dBm is defined as 1mW. The signal level in dBm is 10 times the log of the signal's power over that of the 0dBm reference.
DecibelA unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio.
dmA unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio.
Declaration of ConformityA signed document regarding compliance of a product with European safety standards and legislation.
Detector - Peak, Quasi-Peak, Slideback PeakDetector is used as the final stage of demodulation in a superhetrodyne receiver. It is used to recover the envelope of the input or baseband signal from the intermediate frequency (IF) components or carrier.
Dielectric AbsorptionThe effect when a capacitor that has been charged for a long time and then been completely discharged has a small voltage on its terminal wires again, within seconds or minutes.
