Tutorial: Computer System Advantages of Magnetic Bubble Memories

Magnetic bubbles, which offer improved access time over most conventional fixed-head disks, are now serious contenders for memory applications in computer systems. Current literature abounds in descriptions of various technological advances that have led to experimental memory systems.^1,2,3Bubble memory chips containing up to 20,510 bits per chip have been exercised through transfer-read-transfer-circulate cycles in good loops at 100 KHz data rate.¹An overview of current technology capabilities and a look into the future have been presented by H. Chang.⁴