Hysteresis-compensating interpolation circuits in optical encoders

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United States of America Patent

PATENT NO 8841600
APP PUB NO 20120104236A1
SERIAL NO

12916579

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Abstract

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Disclosed are various embodiments of circuitry and methods to compensate for variations in hysteresis associated with the comparators of an interpolation circuit in a single track optical encoder. Such variations in hysteresis may be minimized or eliminated by providing appropriately configured resistor ladder circuits to condition the inputs to the comparators, or by programming or trimming resistors in positive feedback loops of the comparators. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed.

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Patent Owner(s)

  • AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chew, Gim Eng Bayan Lepas, MY 29 280
Sam, Weng Chong Simpang Ampat, MY 1 7
Thor, Chung Min Ipoh, MY 10 69

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