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
Optical receiver and optical transfer apparatus
Virtual physician acute myocardial infarction detection system and method
Method and system for Bluetooth low power link layer connection setup
Low offset, fast response voltage controlled current source and controlling method thereof
Methods and systems for representing missed approach information in perspective view on a cockpit display
Profiling activity through video surveillance
System and method for redundant array copy removal in a pointer-free language
  Randomly Featured Patents
Pilot operated relief valve
OCR and Bar code reader using multi port matrix array
Gastro-intestinal lavage system and method
Asymmetric folded spring flexure suspension system for reciprocating devices
Process for removing contaminants from hydrocarbon obtained from recycled materials
Light fixture
Method for forming micropattern of resist
Synchronization tracking method
Transvaginal probe for use in pelvic scanning or the like
Synchronization detection apparatus