Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Semiconductor memory device
Light emitted diode
Query processing with specialized query operators
Nonvolatile semiconductor memory device and method for controlling the same
Composite conductive pads/plugs for surface-applied nerve-muscle electrical stimulation
Load control device
Female urine funnel
  Randomly Featured Patents
Infrared radiation detector
Pressure adjusting device for controlling liquid gas flow rate
Device for moving a thread of a surgical sewing instrument
Enclosure for telecommunication equipment
Adjusting mechanism for a prosthetic
Skimmer for oil spills
Set top box
Polyphosphazene blends
N-[3-(4-Methyl-3-cyclohexenyl)butyl]amines and their use as plant growth regulators
Disposable needle guide system