Resources Contact Us Home
Absolute optical encoder system

Image Number 12 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
Visual universal decryption apparatus and methods
Method for reserving network bandwidth for versioned network services
Document-related representative information
Transparent conductive structure
Methods of diagnosing a plasmodium infection
Generating wiki pages from content and transformation objects
Semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Tank for a floor care appliance
Apparatus and software system for and method of performing a visual-relevance-rank subsequent search
Catalytic hydrogenation process for the production of low trans fat-containing triglycerides
Timepiece with mobile decorations
Monomer/solvent separation and recycle process for propylene containing polymers
Process for the manufacture of a calcium fortified yogurt with improved heat stability
Restaurant telephone entertainment system
Inductive antenna coupling for a surface acoustic wave transponder
Radio control device, mobile station, and mobile communication method
Torsional vibration damper