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
System and method for sales tax automatic declaration
Epoxy resin composition with reduced toxicity
Quinolone compound and pharmaceutical composition
Systems and methods of decoding data using soft bits at a non-binary decoder that uses probabilistic decoding
Insulated and refrigerated beverage transport line
Combining network endpoint policy results
Integrated micromachining proximity switch sensors in air/oil lubricators
  Randomly Featured Patents
Staple removeable by hand
Method of gas carburizing
Method for real-time change of slot duration within a wireless network
Marked precoated medical device and method of manufacturing same
Cap for fuel tank
Confection product
Storage box
Optical transmission device
Process for making polyimides from diamines and tetracarboxylic diacid diester
Golf club head