Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2011-02-22
2011-02-22
LeDynh, Bot L (Department: 2858)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S225000
Reexamination Certificate
active
07893690
ABSTRACT:
A balancing circuit for a metal detector. The metal detector includes an oscillating power source, a transmit coil connected to the oscillating power source, first and second receive coils inductively coupled to the transmit coil, a first amplitude balancing circuit connected to the first receive coil, and a first phase balancing circuit connected to the first receive coil. The first phase balancing circuit includes a capacitor and a variable resistor.
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Office Action in MX/A/2010/010297—English translation, dated Jun. 11, 2010.
Carnes Company, Inc.
Ledynh Bot L
Michael & Best & Friedrich LLP
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