Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Absolute optical encoder system










Image Number 2 for United States Patent #4445110.

An optical code disc includes a fine track which provides a high resolution signal, at least one V scan natural binary track synchronized to the fine track by lead and lag detectors, and Gray code tracks which provide the most significant bits of the digital output of the encoder system. The number of circuit elements in the multiplier circuitry associated with the fine track are reduced by means of a quadrant switching technique whereby the sinusoidal inputs to the multiplier are repeated through each quadrant of the fine track cycle. The V scan and Gray code tracks are optically multiplexed to reduce the number of leads from the optical detector. The use of both V scan and Gray code tracks minimizes the number of detectors required in the system while maintaining large detector signals from each track. The V scan and Gray code outputs are synchronized by the use of an overlapping bit.








 
 
  Recently Added Patents
Method of estimating remaining constant current/constant voltage charging time
Polyolefin and composition for pipe systems and sheets
Field-programmable analog array with memristors
Buck converter having reduced ripple under a light load
Semiconductor device having a first conductive member connecting a chip to a wiring board pad and a second conductive member connecting the wiring board pad to a land on an insulator covering
Crosslinked core/shell polymer particles
Pallet
  Randomly Featured Patents
Connection module for switching device and connection rail
Optical position detection device and distance measurement device
Method of manufacturing an electric heater assembly
Sterilizing container for medical and surgical instruments and apparatus
Polyetherimide-polyphenylene ether blends
Compositions and methods for high temperature stable catalysts
Thread supply apparatus, particularly for knitting machine
Medium earth orbit augmentation of a global positioning system for global navigation
Maintaining dasd and tape continuous availability
Software instrumentation method and apparatus