ELi5:why do memories(SRAM/DRAM) need continuous refreshing to store a bit of information?
In: Engineering
SRAM does not need any refreshing. It is called static ram for a reason. It doo not need constant power to keep the information. You store the data in transistors connected in a circle, most common is two inverters in a circle.
DRAM needs refreshing because it stores data as electric charge in a capacitor and they do leak some and will get discharged over time.
Today when it is SDRAM that is common they have automatic refresh so you just need to signal auto-refresh often enough and it takes care of the refreshing itself. Older DRAM you needed external logic for part of the refreshing procedure.
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