The increasing use of sensors in automotive applications has created a wiring nightmare which it is proposed to minimise by using wire multiplexing techniques. The system described involves an inexpensive magnetic sensor ic that can directly respond to interrogations by the master controller and does not require remote controller board. New technology has been developed to combine cmos devices and bipolar transistors on the same substrate as a hall transducer. Sensor operation is described in detail with explanatory diagrams. A maximum of 30 active sensors can exist on a bus and a sequential addressing scheme reduces sensor complexity. New fabrication procedures are described which were necessary for the design. The size and complexity of the logic circuitry required high-density, low-current complementary logic and had in addition to be merged with hall transducer manufacturing technology. The merging of technologies provides potential solutions to several longstanding problems and the author suggests applications in speed monitoring and twilight sensing.

  • Availability:
  • Corporate Authors:

    Mechanical Engineering Publications Limited

    P.O. Box 24, Northgate Avenue
    Bury St Edmunds, Suffolk IP32 6BW,   England 
  • Authors:
    • Vig, R
  • Publication Date: 1989-6-7


  • English

Media Info

  • Pagination: p. 34-38
  • Serial:
    • Volume: 14
    • Issue Number: 3
    • Publisher: Institution of Mechanical Engineers
    • ISSN: 0307-6490

Subject/Index Terms

Filing Info

  • Accession Number: 00498941
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM