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Absolute Encoder Design: Magnetic or Optical?

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Absolute Encoder Design: Magnetic or Optical?

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This White Paper describes the key parameters of a magnetic and an optical one-chip encoder, the tradeoffs for both solutions and compares the performance of both encoder designs.The angle resolution and accuracy of magnetic position encoders with a diametric magnet and central scanning Hall sensor IC are limited by the feasible depth of interpolation and available field quality. By scanning many sine periods per revolution, the resolution of optical position encoders is much higher.

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