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DRAM

DRAM - Dynamic RAM is a common type of RAM.

Made of an integrated circuit (IC), composed of millions of transistors and capacitors.

A capacitor can hold electrons. An empty capacitor represents a zero, and a non-empty capacitor represents a one. Each capacitor can register either a zero or a one for a memory cell, storing one bit of data.

The transistor is like a switch that controls whether the capacitor's state (charged or not charged, 1 or 0) is to be read or changed.

However, a capacitor is like a cup that leaks, in order to keep its charge, the memory control needs to be recharged or refreshed periodically. Therefore, it is called the dynamic RAM because its state is not constant.

Refreshing capacitors also takes time and slows down memory.

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