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
Antenna device
Epilation apparatus
Method and apparatus for decoding/encoding a video signal with inter-view reference picture list construction
Wafer level packaging structure with large contact area and preparation method thereof
Soybean cultivar CL1013663
Compounds for the reduction of .beta.-amyloid production
DC/DC converter, power supply circuit, and semiconductor device
  Randomly Featured Patents
Materials for and method for manufacturing container with integrated divider and resulting container
Surface pressure distribution sensor
Cost effective high performance circuit for driving a gas discharge lamp load
Demonstration calculator for classroom use and the like
Square root method for computationally efficient model predictive control
Methods for extracting information on interactions between biological entities from natural language text data
Processing apparatus having four processing units
High purity silicon carbide wafer boats
Solderable lead
Multiple ply tissue paper