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System and method for detecting an underground object using magnetic field sensing

  • US 7,759,824 B2
  • Filed: 04/07/2006
  • Issued: 07/20/2010
  • Est. Priority Date: 12/30/1997
  • Status: Expired due to Fees
First Claim
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1. A power supply arrangement for use with the electronic components of an underground tool, the power supply comprising:

  • a direct current power source;

    a digital voltage regulator having an input connected to the power source and a positive output;

    a positive voltage regulator having an input connected to the power source and a positive output;

    a switched inverter having an input connected to the power source and a negative voltage output;

    a negative voltage regulator having an input connected to the output of the inverter and a negative output.

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