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
Apparatus and method to simulate a power trip to a disk drive
Card reader device
Case for electronic device
Light emitting device
Memory component and memory device
  Randomly Featured Patents
Method for reducing extrusion of sealing elements
Mooring device
Apparatus for classifying a material by analyzing the material's surface, and related systems and method
Folded waveguide traveling wave tube having polepiece-cavity coupled-cavity circuit
Method for testing a filter in a dialysis system
Positive locking connector for vehicle component
Semiconductor interconnect barrier of boron silicon nitride and manufacturing method therefor
Head positioning mechanism for magnetic disk device provided with micro tracking actuator using magnetic force drive control method therefor
Method of identifying a compound that modulates XAF-mediated apoptosis
Telecommunications switching system with readily configurable supervisory control