1. Magnetic Bubble Memory Linear Interface Circuits
- Author
-
M. J. Birch, E. R. Brown, and A. D. Nicholls
- Subjects
Read-only memory ,Engineering ,Computer science ,business.industry ,Sense amplifier ,Amplifier ,Bubble ,Differential amplifier ,Integrated circuit ,Fault (power engineering) ,Driver circuit ,Fault detection and isolation ,law.invention ,Magnetic circuit ,Capacitor ,law ,Electronic engineering ,Bubble memory ,Electrical and Electronic Engineering ,Current (fluid) ,business - Abstract
Two bipolar integrated circuits are described which provide the write and sense functions required by magnetic bubble memory systems, both organized in four-channel format to minimize board area occupied. The write driver circuit has a 300 mA drive capability and includes on-chip circuitry which prevents fusing of the delicate bubble `hairpin' structure under fault conditions. The sense amplifier has programmable sensitivity in the range of 1 mV to 10 mV and allows the bubble device to be directly coupled to the differential input while tolerating DC offsets of up to /spl plusmn/150 mV without significantly modifying sensitivity.
- Published
- 1980