Magnetic bubble transducer

Details Magnetic bubble transducer Magnetic bubble transducer

1980-07-21

1982-04-27

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Detectors

365209, G11C 1908

Patent

active

043274234

ABSTRACT:
A circuit arrangement is disclosed for sensing a presence or absence of a low-level output signal which may be used for detecting a change of resistance in a magnetic bubble detector. The circuit operates in a D.C. coupling mode whereby the low-level signals are directly coupled into a sense amplifier, which is preceded by the circuit above-mentioned. The circuit, which comprises a modified current mirror, is used as a resistance transducer which converts a change of resistance (.DELTA.R) into a direct change of voltage (.DELTA.E). The change of voltage provides an indication of the presence of, for example, a magnetic bubble.

REFERENCES:
patent: 4151601 (1979-04-01), Verhulst
IBM Technical Disclosure Bulletin--vol. 5; No. 3, Aug. 1962, pp. 26-27.

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