What solid-state components in a mobile phone maintain proper voltage levels in the circuits?

transistors

diodes

microchips

capacitors

Diodes

Explanation:

Diodes are solid-state components that allow current to flow in one direction (forward biasing).

We can see from the graph of input voltage and current that under reverse biasing a negligible current is flowing.

And under forward biasing negligible current is flowing up to .

After crossing this potential barrier we can observe an increase in current but the voltage does not go higher than . Even with the high input voltage.

Hence, diodes helps in maintain proper voltage level in the circuits.

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hope this you out ^w^