PHYS-P 150 Lecture Notes - Lecture 37: Dynamic Random-Access Memory, Flash Memory, Magnetic Storage
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Access that charge through an fet: devices that are controlled by the presence or absence of charge. Designed to be extremely fast and reliable, but require power to keep the data present. Flash memory: semipermanent-usually have a lot more of flash memory than dynamic. Dynamic ram is faster: but when you increase dynamic ram in a phone, this drains the phone"s battery more quickly. For flash memory and magnetic storage, the size of the semiconductor devices limits the storage capacity. For dvds, the wavelength of laser light limits the storage capacity. Using multiple channels at the same time. Allow phones to use multiple channels at the same time. Treats all data (like voice and other types) in the same way. Goes back to the early days of telegraphy. Digital communications is a 19th century technology: used dots and dashes to transmit essentially text messages. Eventually evolved to using radio waves later.
