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All semiconductor memory, not just RAM, has the property of random access. DRAM (Dynamic random-access memory) – This uses memory cells consisting of one MOSFET (MOS field-effect transistor) and one MOS capacitor to store each bit. This type of RAM is the cheapest and highest in density, so it is used for the main memory in computers.
Modern computer memory is implemented as semiconductor memory, [5] [6] where data is stored within memory cells built from MOS transistors and other components on an integrated circuit. [7] There are two main kinds of semiconductor memory: volatile and non-volatile. Examples of non-volatile memory are flash memory and ROM, PROM, EPROM, and ...
[12] [13] The invention of the MOSFET enabled the practical use of metal–oxide–semiconductor (MOS) transistors as memory cell storage elements, a function previously served by magnetic cores. [14] The first modern memory cells were introduced in 1964, when John Schmidt designed the first 64-bit p-channel MOS static random-access memory (SRAM).
Dynamic random-access memory (dynamic RAM or DRAM) is a type of random-access semiconductor memory that stores each bit of data in a memory cell, usually consisting of a tiny capacitor and a transistor, both typically based on metal–oxide–semiconductor (MOS) technology. While most DRAM memory cell designs use a capacitor and transistor ...
The two main types of volatile random-access semiconductor memory are static random-access memory (SRAM) and dynamic random-access memory (DRAM). Non-volatile RAM has also been developed [ 3 ] and other types of non-volatile memories allow random access for read operations, but either do not allow write operations or have other kinds of ...
The technology, called 3.5D XDSiP, will allow Broadcom's custom-chip customers to boost the amount of memory inside each packaged chip and speed up its performance by directly connecting critical ...
LCDs can have SRAM in their LCD controllers. SRAM was used for the main memory of many early personal computers such as the ZX80, TRS-80 Model 100, and VIC-20. Some early memory cards in the late 1980s to early 1990s used SRAM as a storage medium, which required a lithium battery to keep the contents of the SRAM. [14] [15]
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