SRAM and DRAM

SRAM-Static Random Access Memory

SRAM or Static RAM is a type of a semiconductor memory where the word static indicates that ,it does not need to be periodically refreshed , as SRAM uses bistable latching circuitry  to store each bit.

Although it is quicker ,more expensive and holds fewer data per unit volume .It is commonly used in Cache and Video Card memory.

DRAM-Dynamic Random Access Memory

DRAM or Dynamic RAM is a type of physical memory used in most of personal computers .The term dynamic indicates that the memory must be constantly refreshed ( re-energized ) or it will lose its content.

• RAM is sometimes referred as DRAM to distinguish it from SRAM

 DRAM stores information in a cell containing a capacitor and transistor ;because of this design ,these cells must be refreshed with new electricity every few milliseconds ,allowing the memory to keep its charge and hold the data as long as needed .

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