Resources Contact Us Home
Absolute optical encoder system

Image Number 13 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
Pizza stone
Security authentication method, apparatus, and system
Vaccination with killed but metabolically active (KBMA) protozoans with toll-like receptor agonists
Method and system for evaluating/analyzing patent portfolio using patent priority approach
Trash receptacle
RF amplifier with digital filter for polar transmitter
Method for assisting in the checking of transaction records, transaction device, server, mobile terminal, and corresponding computer programs
  Randomly Featured Patents
Emergency light bar mounting assembly rotatable between a horizontal deployed position and a vertical stowed position
Multiple disk clutch stamped adapter ring
Support jack more particularly adapted to support a tool holder of a machine tool and in particular of a polishing machine
Multicode transmission using Walsh Hadamard transform
Logical, safe, and more personal user interface for accessing data and launching programs or applications
Removal of organic anti-reflection coatings in integrated circuits
MEMS microphone package and method thereof
Christmas tree holder
Pharmaceutical cabinet locking arrangement
Cutting torch for through cutting workpieces