Howtosignalprocessing
- Why DC component is not desirable in a signal?
- What is DC component in signal?
- Why do some devices need DC?
- How does an AC signal become a DC signal?
Why DC component is not desirable in a signal?
A DC component is undesirable for transformer-coupled communications, because it can cause saturation issues in the transformer cores. You would rather use all of the B-H curve of the transformer for coupling the AC communication information, and not have an offset B-H curve start to limit the AC components.
What is DC component in signal?
“DC” stands for “direct current”, in contrast to the sinusoids, which “alternate”, though we use this term even if the signal isn't a current. In a sense, the DC component is like the “zero frequency component”, since cos(2π·0·t) = 1.
Why do some devices need DC?
DC is used as low voltage , as most of modern electronics operate at vey low voltages and in some case batteries in small sizes can support the sensors for years like gas and fire detectors. Many places you can not run wires for Ac, Dc is the best solution.
How does an AC signal become a DC signal?
Power supplies contain a transformer which converts the mains AC supply to a safe low voltage AC. Then the AC is converted to DC by a bridge rectifier but the output is varying DC which is unsuitable for electronic circuits.
