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
Method of treating lung cancer
Herbicide composition having improved effectiveness, method of preparation and use
Xylitol-based anti-mucosal compositions and related methods and compositions
SRAM cells using shared gate electrode configuration
Switchable solvents and methods of use thereof
Method, apparatus and article for detection of transponder tagged objects, for example during surgery
Synchronization of communication equipment
  Randomly Featured Patents
Dust extraction installation for blast furnace gas
Computer stand
Hose fitting with automatic separation under strong tensile stress
Fuel injection nozzle
Hot air brush
Cigarette packaging machine
Chimney brace
Method of injection over-molding articles
Screen printing method and screen printing apparatus
Microgravity condensing heat exchanger