MAGNETIC BUBBLE MEMORY Meaning and
Definition
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Magnetic bubble memory, also known as bubble memory or magnetic-stripe memory, is a type of non-volatile computer memory that stores information using small magnetic areas, known as bubbles, within a thin film of a magnetic material. It was developed in the 1970s as an alternative to semiconductor-based memory technologies such as magnetic core memory and solid-state memory.
Magnetic bubble memory works by creating and manipulating small, magnetized cylindrical bubbles within a thin film of a magnetic material. These bubbles represent binary data (0s and 1s) and can be moved around on the film using magnetic fields. The bubbles are created by heating the magnetic film, causing localized regions of lower magnetization, which are then controlled and moved by applying magnetic fields from nearby electromagnets.
The advantage of magnetic bubble memory over other memory technologies at the time was its non-volatile nature, meaning it retained the stored data even when the power was turned off. It also provided high-speed read and write operations, making it suitable for a range of applications including computer systems, scientific instruments, and digital signal processing.
However, the use of bubble memory declined in the 1980s as more advanced semiconductor-based memory technologies, such as flash memory and dynamic random access memory (DRAM), became more common and affordable. Today, magnetic bubble memory is considered obsolete and has been largely replaced by these modern memory technologies.
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