A comparison of nonvolatile memory technologies for spacecraft applications

P. J. Stoll
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Abstract

A generic application for nonvolatile mass memory on the order of 2 Gb is discussed for space applications. This system would be large enough to store satellite data for readout to the ground over readout sites. The memory should be block-addressable, so it can be used as a magnetic disk replacement. It is concluded that only 4-Mb magnetic bubble memories are currently able to replace spaceborne magnetic tape recorders for gigabit-size memories, with no penalty in size and only 50% higher weight. Since bubble memories have longer inherent life than tape recorders, additional size and weight savings could result. As far as EEPROMs (electronically erasable programmable read-only memories) are concerned, a lightweight, 2-Gb memory will have to await development of wafer-scale integration. Otherwise, the 2000 to 16000 separate chips required to supply two gigabits of storage require excessive complexity of fabrication and wiring.<>
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航天器非易失性存储技术的比较
讨论了用于空间应用的2gb量级的非易失性大容量存储器的一般应用。这个系统足够大,可以存储卫星数据,以便在读取站点上向地面读取。内存应该是块可寻址的,因此它可以用作磁盘的替代品。结论是,目前只有4mb的磁泡存储器能够取代千兆级存储器的星载磁带录音机,在尺寸上没有损失,重量只增加50%。由于气泡存储器的固有寿命比磁带录音机更长,因此可以节省额外的尺寸和重量。就eeprom(电子可擦除可编程只读存储器)而言,轻量级的2gb存储器将不得不等待晶圆级集成的发展。否则,提供2千兆存储所需的2000到16000个独立芯片的制造和布线过于复杂
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