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
Radiation-curable ink composition, ink jet recording method, and recorded matter
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Group control method for machine type communication and mobile communication system using the method
System and method for browsing tabbed-heterogeneous windows
Drinking glass with ball embedded in base
Composite conductive pads/plugs for surface-applied nerve-muscle electrical stimulation
  Randomly Featured Patents
Image processing using information of one frame in binarizing a succeeding frame
Roller belt arrangement for endless track vehicles especially snowmobiles
System and method of windows management
Semiconductor integrated circuit fabrication method
Bearing for automobile pulleys
Cant dimension readere using moving light source
Data input device
4-[(heterocycloalkyl or heteroaromatic)-substituted phenyl]-2-azetidinones useful as hypolipidemic agents
Patient monitor with fluid port protection
Automatic hopper gate locking mechanism