Dynamic random-access memory
DRAM is a type of random access memory that stores each bit of data in a separate capacitor. As leakage causes the charge on a capacitor to decay, the capacitors must be refreshed periodically. This makes the circuit more complicated, but the advantage is that capacitors are cheap and small, so high-density, low-power memory chips can be made using this technology.
Special Types of DRAM
- extended data out (EDO)
- fast page mode
- synchronous (SDRAM)
- RAMBUS (RDRAM)
- double data rate (DDR)