Structure and Function
The structures of both equipment Fairly account for its main characteristics. Furthermore, they are also the reason behind their respective pros and cons. For an in-depth explanation of how DRAM and SRAM work, Let’s begin with DRAM Analysis,
DRAM or Dynamic Ram works on DRAM Chips that hold one bit of data. It is composed of a transistor and a capacitor. This is combinedly also known as one memory cell. The work of the transistor is to allow or control the circuitry on the memory chip to read it or change the state of the capacitor, while the capacitor is responsible for holding the Information bit in the form of 1 or 0.
Precisely, the capacitor is a container that stores the electrons. A container full of electrons resembles the 1 bit, while the container empty of electrons designates a 0. However, in time, the capacitors usually have leakage that causes them to lose their charge, subsequently making the “container” empty after just a few milliseconds. This leads to a prevalent recurring issue.
Hence, The Capacitor within the DRAM chip must be recharged with the help of the CPU or memory controller before they entirely run out of juice in order to retain data.
In order to do the same, the CPU reads the data and then redo the filling of all the capacitors with electrons. This whole process is summed up in the word refreshing. Refreshing occurs at the frequency of thousands of times per second in any DRAM chip. This is the reason behind the word “Dynamic” in the Dynamic RAM. Dynamic basically refers to the necessary refreshing to retain the data.
However, the need to constantly refresh data makes the DRAM slower.
The Static RAM, which relies on flip-flops, is one of two stable states in RAM that support circuitry. Each state can be read as 1 and 0, respectively. A flip-flop usually requires six transistors. Moreover, it has the advantage over DRAM as it does not necessary to be refreshed. This sleek ability also makes the SRAM faster than DRAM.
Contrary to the above, SRAM cells can take up more space on a chip than a DRAM. It happens due to the need for more parts and wiring in SRAM. This also makes the SRAM more expensive than DRAM. Furthermore, SRAMs are harder to manufacture as well.