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IBM Journal of Research and Development  
Volume 19, Number 4, Page 344 (1975)
Nontopical Issue
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Modular Hall Masterslice Transducer

by R. J. Braun
The Hall masterslice transducer combines modern IC (integrated circuit) technology with a modular design concept to provide a flexible multifunction approach to magnetic sensing. Its sensing element, a controllable Hall cell, is integrated with the associated circuitry on a masterslice chip, mounted in a flux concentrator module that forms the basic building block for diverse application packages. The device has several auxiliary control electrodes that allow fixed or externally variable offset voltage control and magnetic field simulation, as well as threshold, hysteresis, and gain adjustments. Integral flux concentrators provide the module with an efficient magnetic flux path and chip cooling. Three application categories—switches, proximity sensors, and current sensors—are discussed and various application package designs are presented.
Related Subjects: Physics, solid state; Semiconductor devices