Dynamic pre-balancing in a metal detector

A method for dynamically pre-balancing a metal detector, the method comprising:

• selecting one of a plurality of capacitor bank configurations defined by an array of capacitor banks to assign to one of a first receiver coil, a second receiver coil, or neither receiver coil, wherein each capacitor bank configuration is associated with a respective capacitance value;
• assigning the selected one of the plurality of capacitor bank configurations to one of the first receiver coil, the second receiver coil, or neither receiver coil;
• selecting one of a plurality of resistor configurations defined by at least one resistor to assign to one of the first receiver coil, the second receiver coil, or neither receiver coil, wherein each resistor configuration associated with a respective resistance value;
• and
• assigning the selected resistor configuration to one of the first receiver coil, the second receiver coil, or neither receiver coil.

A balancing circuit for a metal detector, the balancing circuit comprising:

• an array of capacitor banks selectively connectable to one of a first receiver coil, a second receiver coil, or neither receiver coil, the array having a plurality of capacitor bank configurations, each capacitor bank configuration associated with a respective capacitance value;
• at least one resistor selectively connectable to one of the first receiver coil, the second receiver coil, or neither receiver coil, the at least one resistor having a plurality of resistor configurations, each resistor configuration associated with a respective resistance value;
• and
• an electronic processor configured to dynamically pre-balance the metal detector by:
• selecting a capacitor bank configuration to assign to one of the first receiver coil, the second receiver coil, or neither receiver coil,
• assigning the selected capacitor bank configuration to one of the first receiver coil, the second receiver coil, or neither receiver coil,
• selecting a resistor configuration to assign to one of the first receiver coil, the second receiver coil, or neither receiver coil, and
• assigning the selected resistor configuration to one of the first receiver coil, the second receiver coil, or neither receiver coil.