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The Pen Drive has the flash memory that is used in it. The Pen Drive is usually connected to the USB port that is available in the computer motherboards. The USB port or as the abbreviation stands for the Universal Data Bus is the most popular type of connector these days to provide the connection to the many different devices. There is also available these days the mouse that has the USB connectivity. Mostly the USB connector is used for the connection of the printers.
The USB as a matter of fact has become so popular these days that its place is brought to the front of the computer from the previously rear end of the computer case. This shows a sort of promotion. Hence it means that there are many devices that are available now that utilize the services of the USB port. The pen drive is also one among them. The kind of memory used in the Pen Drive is the flash memory. This Flash memory is gaining momentum in almost all type of devices that utilize the services of the digital memory. The flash memory chips are available in the market for even enhancing the existing memory capacity.
The pen drive is actually the USB flash memory. The conventional name may be same as that of the USB flash memory. But the name given here is to catch the attention of the customer. The pen drive is so called because it has the memory that is built in the drive and is similar to the shape of the pen. The features like the compactness and sleek look make it very popular.
The pen drive is usually so designed for the purpose of the data transfer. The other features like the mp3 players and the radio or the key chain etc may be available with it but in normal conditions are optional. These are available in the memory capacity that may start the range from 32 MB to as much as 2 GB presently. In the near future it is expected that the storage capacity will still be upgraded.
The concept involved in the pen drive is that the memory is stored in the form of the array where in the information or the data is stored. The information or the data is stored in the form of the array of transistors. This array of transistors is called as the cells. Each of these cells stores at least one bit of information traditionally. But due to the advancements in the technology the newer versions may even have multi level cells. The data can be stored in more than a bit or specifically only one bit per cell. This is done by the technique of varying the number of electrons that are placed over the floating gate of the cell.
The concept of the flash memory is based on the principle of the Floating Gate Avalanche Injection Metal Oxide Semiconductor or in short referred to as the FAMOS transistor. This is the NMOS transistor. This transistor has an additional conductor that is suspended in between the source/drain terminals and gate. The flash memory comes usually in two types. These is two types are mentioned below: the first one is the NOR flash and the second one being the NAND flash. The names given to the types of the flash memory actually refer to the type of the logic gate that is used in each storage cell.
The flash memory that is used in the pen drive is actually a non volatile memory that is the contents remain intact even if there is a power failure.
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