what is semiconductor memories-DRAM,SRAM,FLASH?

Answer 1

the industry brought up different types of memory over the years for different requierments
imagine a DRAM (dynamic RAM) as to be a hughe block of small capacitors, which can hold a voltage as information for a short time. this short time is like micro to milliseconds.
advantage: its very fast
disadvantage: it needs to be refreshed by a mechanism to keep its content,

SRAM is a 'static RAM' made of a few transistors, it holds information without the need of having a refreshing mechanism as long as the ram itself has power.
the power consumption of SRAM is very low, so it was used on older PC-boards to keep BIOS information stored while the computer was switched off ..using a small lithium-cell as a power source

FLASH-RAM now is a spin-off of an older technology called EEPROM a flash-Ram stores information in a kind of harwired way, which does not require any powersource keeping it. its used in modern USB sticks and modern PC-boards to store BIOS info
Flashram has the disadvantages that it has limited write-cycles and is much slower than SRAM or DRAM. especially if you write information into it
(but its faster than a harddisk)

Answer 2

DRAM (Dynamic Random Access Memory) is used as the main memory in computers. There are volatile, meaning the content is erased when the power supply ceases. They are dynamic in a sense that their content need to be refreshed every (less than) 5 msec to memorize it. These memories are the fastest in data retrieval.
SRAM (Static RAM) is slower than DRAM. They are also volatile, however they don't require refreshing.
FLASH (this is not the acronym) are non-volatile. They work like EEPROM (Electrically Erasable Programmable Read Only Memories). They are used for memory sticks, digital cameras, and lately replacing hard drives or in combination with them.

Answer 3

Semi-conductor reminiscence works via allowing saved electical costs for use in a circuit containing micro-circuitry.. i could guess..power furnish and resisitance could be a usual state.. and secondary properties could look into formulation's.. reminiscence could be a relentless element approximately Processor technologies.