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Current sensor

  • US 9,128,128 B2
  • Filed: 06/10/2011
  • Issued: 09/08/2015
  • Est. Priority Date: 06/10/2011
  • Status: Active Grant
First Claim
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1. A voltage or current detection device, comprising:

  • drive circuitry configured to deliver a drive current to a magnetic core operably coupled with a conductor, for driving the core to cyclical magnetic saturation;

    sense circuitry configured to receive a voltage signal corresponding to an application current in the conductor;

    signal processing circuitry configured to sample the voltage signal, wherein a first sample is in phase with the drive current and a second sample is out of phase with the drive current; and

    a feedback loop configured to deliver a compensation current to the magnetic core, wherein the compensation current is configured to balance the magnetic core and wherein the compensation current is based at least in part on the first sample in phase with the drive current;

    wherein the signal processing circuitry is configured to be operably coupled to a signal aspect processor configured to externally communicate an indicator signal, relating to the voltage signal, for use in controlling vehicles.

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