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
Method of manufacturing acrylic film, and acrylic film
Methods and apparatuses for configuring and operating graphics processing units
High conductive water-based silver ink
Method for forming ventilation holes in an electrode plate
Multi user MIMO detection utilizing averaged spatial whitening
Systems and methods for dynamically modifying subcriber service profile stored in home location register while roaming in wireless telecommunication networks
Process of preparing functionalized polymers via enzymatic catalysis
  Randomly Featured Patents
Elevator conveyor
Plastic bag slider and end termination installation assembly and method
4-methylpyridopyrimidinone compounds
Fishing reel
Dynamo-electric machine
Electric cable splicing system
Snap in weatherstripping
Content addressable memory with configurable class-based storage partition
Method and device for activating a media player
Humidity and/or temperature sensor