Resources Contact Us Home
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
Soybean cultivar CL1013665
Controlling generation of debug exceptions
Synergistic compositions for the treatment of topical viral infections
Rear bumper for an automobile
Graphical planner
Dynamic rebasing of persisted time information
Validating the configuration of distributed systems
  Randomly Featured Patents
Liquid crystal display and backlight unit using light emitting diode driving circuit
Rubber compounds containing zinc dimethacrylate
Corrosion resistant heat exchanger element and method of manufacture
Encased refrigerating machine
Method and system for synchronization of audio/video (A/V) stream format change in wireless communication systems
Method and system for debugging using replicated logic
Fall arrester, for building works
Process for strip lamination of polymer films and nonwoven fibrous webs
Organic electroluminescent device and its manufacturing process
Analog logic automata