Resources Contact Us Home
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
Solid-state image sensing apparatus and electronic apparatus
Sensor coating
Method and apparatus for rebuilding data in a dispersed data storage network
Printing system, information processing apparatus, print job processing method, information processing method, program, and storage medium
Solid-state imaging device and imaging apparatus
Antibodies to CCR2
Methods and apparatus for intelligent selection of goods and services in mobile commerce
  Randomly Featured Patents
Even bias applying transfer roller
Hydraulic booster valve
Hypericum plant named `Bosaja`
Navigation system with constrained resource route planning mechanism and method of operation thereof
Honeycomb frame for beehives
Automated change-speed gear box
Mattress cover
Oscillation apparatus
Code division multiple access enhanced capacity system
Methods for removing volatile components from polymer solutions