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
Support for a portable electronic device
Semiconductor device and method of manufacturing the same
Establishing a social network
Backside structure and methods for BSI image sensors
Device and method for producing a fluidic connection between cavities
Particle measurement process and apparatus
Field emission cathode device and field emission display using the same
  Randomly Featured Patents
Semiconductor device and method for manufacturing same
Automatic clip driver
Liquid crystal display device and method for displaying a landscape mode image
Apparatus and method for programming a job ticket in a document processing system
Concentrated separator by-product based fertilizer
Rocker arm decoupler for two-cycle engine retarder
Track chain assembly with integral pin and link
Foam book with concertina binding
Mixed aryl/alkyl diester compositions
Method of polishing floors