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Some miniature single-magnet system-on-chip designs integrate field-sensing Hall elements and digital signal processing for simultaneous absolute, incremental, and pulse-width-modulated digital outputs. A small, diametrically polarized magnet rotates above an ASIC; the latter contains an array of Hall effect sensors that detects magnetic flux changes and generates a voltage as the magnet rotates above it.
Shown here is a design in which the magnetic rotor and belts, couplings, and connections of traditional designs are eliminated by one flexible, buckle-on flexible strip of magnetic tape. Today, however, higher resolution is needed from miniature and high-end encoders - a need increasingly met by encoders using magnetoresistive material that lowers bulk resistance by about 1.
6 in the presence of a saturating magnetic field.