DRAM, unlike SRAM, must be continually refreshed in order to maintain the data. This is done by placing the memory on a refresh circuit that rewrites the data several hundred times per second. DRAM is used for most system memory because it is cheap and small. All DRAMs are made up of memory cells which are composed of one capacitor and one transistor.
Characteristics of the Dynamic RAM
● It has short data lifetime
● Need to be refreshed continuously
● Slower as compared to SRAM
● Used as RAM
● Lesser in size
● Less expensive
● Less power consumption
