Considering this, why does Telecom use negative voltage?
(I) Positive voltage cause comparatively more corrosion in metal then Negative voltage. (ii) Negative voltage is safer for human body while doing Telecom activities. In the case negative voltage (Lack of electrons) neutralizes positive charges and protects producing heat.
Subsequently, question is, why do we need negative DC voltage? (iii) Lightning may cause positive voltages in the equipment circuitry. In that case, negative voltages (lack of electrons) neutralize positive charges and prevent excessive heat. (iv) Negative voltage is safer for long telephone line for transmitting power trough it.
Considering this, what is the purpose of negative voltage?
Uses of Negative VoltageRemember that in a BJT transistor, current flows out from emitter to collector. Now that the negative voltage repulses the electrons in the emitter and, thus, forces electrons to the collector, it helps to push current out from the emitter to collector.
How do you create a negative voltage?
For larger output currents, inductive solutions – such as the inverting buck-boost converter – are used. These generate a negative output voltage which can be greater or smaller than the input voltage and provide an advantage over charge pumps. In the first step, when S1 is closed, an inductor is charged with current.
