Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and device for comparing two variable analogue signals










Image Number 3 for United States Patent #5305243.

A device compares two variable analogue signals, e.g. varying in time, such as audio or video signals. The signals, which are either different or identical but shifted in time, are within a predetermined frequency range. The device includes two parallel channels for processing analogue signals. One of the channels introduces a time shift of one signal with respect to the other, the shift being equal to a 1/4 period at the center frequency of the band. Both channels include in series circuits for transforming the analogue signals into binary logic signals, a logic circuit, a summing circuit for establishing a first and second correlation signal. An adder adds the absolute values of the first and second correlation signals to form a third correlation signal that is substantially independent of any time shift between the analogue signals.








 
 
  Recently Added Patents
Subcarrier cluster-based power control in wireless communications
Sparse data compression
Peptides useful in the treatment and/or care of skin, mucous membranes, scalp and/or hair and their use in cosmetic or pharmaceutical compositions
Method and system for monitoring service quality in a mobile node
Organic light emitting diode device and fabrication method thereof
(4950
Asymmetric switching rectifier
  Randomly Featured Patents
Separating stock hydraulic speargun
Method of forming a porous carbonaceous preform from a water-based slurry
Reflecting structure, light-scattering member, light-guiding plate and lighting device
Self powered servo actuated backpressure regulating valve
Raman amplification
Capacitor apparatus of the capacity variable type
Authentication history certification system and method thereof
Laundry bag
Method and system for training traders
Method, apparatus, and computer program for suppressing noise