Static information storage and retrieval – Magnetic bubbles
Patent
1987-11-19
1990-06-05
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
365 6, 371 13, G11C 1908
Patent
active
049319906
ABSTRACT:
An economical circuit arrangement permits disruption, during a nuclear event or single event upset, of operation in portions of a bubble memory system and in a computer connected thereto while maintaining integrity of data stored in the bubble memory. Only critical portions of the bubble support circuits are radiation hardened, and a nonstop logic circuit is provided to continue operation during a nuclear event and to conclude any memory access cycles already in progress at the beginning of the event. Spurious (ionization induced) drive pulses are distinguished from actual pulses. A nuclear event detector generates an output pulse during the event and a delay is provided in a path of the pulses in the critical circuit portions. The delay is greater than the duration of the output pulse of the detector so that pulses arriving after the detector pulse are ignored.
REFERENCES:
patent: 4027283 (1977-05-01), Tang
patent: 4031374 (1977-06-01), Groudan et al.
patent: 4199810 (1980-04-01), Gunckel et al.
patent: 4216541 (1980-08-01), Clover et al.
patent: 4365332 (1982-12-01), Rice
patent: 4394763 (1983-07-01), Nagano et al.
patent: 4400795 (1983-08-01), Irie et al.
patent: 4404673 (1983-09-01), Yamanouchi
patent: 4413327 (1983-11-01), Sabo et al.
patent: 4464752 (1984-08-01), Schroeder et al.
patent: 4532628 (1985-07-01), Mattews
patent: 4598402 (1986-07-01), Matsumoto et al.
patent: 4612640 (1986-09-01), Mehotra et al.
Davis David L.
Moffitt James W.
Perkin Bruce C.
LandOfFree
Hardened bubble memory circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hardened bubble memory circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hardened bubble memory circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-497133