A DC electrical signal is constant and has no oscillations; a plane wave propagating parallel to the optic ( z ) axis has constant value in any " x "-" y " plane, and therefore is analogous to the ( constant ) DC component of an electrical signal.
32.
The DC component, " F DC ", contributes to the topographical signal, the term " F ? " at the characteristic frequency " ? " is used to measure the contact potential and the contribution " F 2? " can be used for capacitance microscopy.
33.
The demodulator output is sent through a low-pass filter to remove the 2 " ? " component and leave the DC component then the signal is integrated over a period of time defined as the " Time Constant ", " ? LiA " which is a user-definable parameter.
34.
Secondly, the url is a bit more variable than you think : the d / dc component can vary-a quick look at Sheep reveals the following variants : 2 / 2c 4 / 4c c / c2 2 / 20 a / a1 6 / 6f 3 / 39 . I have no idea how to predict them.
35.
They can be used to block radio frequency interference or the DC component of an audio signal, to split or combine audio signals, or to provide impedance matching between high impedance and low impedance circuits, such as between a high impedance tube ( valve ) amplifier output and a low impedance loudspeaker, or between a high impedance instrument output and the low impedance input of a mixing console.
36.
On the other hand, the legitimacy of branding single-ended triode amplifiers as adequate for Hi-Fi purposes is debated, as from a technical standpoint, SET amplifiers are considered to be generally far inferior to subsequent ( and more common ) push-pull tube designs or solid-state amplifiers : SET designs require output transformers which are able to cope with a strong DC component in the signal, which causes them to have worse performance in regard to frequency response, distortion and efficiency ( although the latter is not generally a priority for most SET enthusiasts, or audiophiles in general ).
