How does sdram differ from ordinary dram




















DRAM looks at the state of charge in a transistor-capacitor circuit see Figure 1 ; a charged state is a 1 bit; the low charge is seen as a 0 bit. See Figure 2. DRAM uses capacitors that lose charge over time due to leakage, even if the supply voltage is maintained.

Since the charge on a capacitor decays when a voltage is removed, DRAM must be supplied with a voltage to retain memory and is thus volatile. Due to capacitor leakage, DRAM needs to be refreshed often. SRAM does not use capacitors. SRAM uses several transistors in a cross-coupled flip-flop configuration and does not have the leakage issue and does not need to be refreshed.

Figure 3. SRAM cell with six transistors. And what is the difference between them? DRAM can be used for the data or program code required by the computer processor to run. DRAM is the most common type of computer memory and is widely used in digital electronic products that require low-cost and large-capacity computer memory.

It is short for synchronous dynamic random access memory and it has a synchronous interface. Through this interface, the change of the control input can be recognized after the rising edge of its clock input.

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