Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hughes Sanoner0
Lawrence Chi Hang Chan0
Desmond Wai Nang Tse0
Date of Patent
July 12, 2011
0Patent Application Number
118438580
Date Filed
August 23, 2007
0Patent Primary Examiner
Patent abstract
A metal detector for detecting the presence of a ferrite object in the proximity of inductively coupled sensor having overlapping D shaped transmitter and receiver coils. The metal detector has a phase shift circuit to phase shifting a sensor output signal by a known amount and a switch operating in synchronization with an excitation signal of the sensor for sampling the amplitude of the phase shifted output signal.
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