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Connector with active shielding

  • US 9,977,096 B2
  • Filed: 07/07/2011
  • Issued: 05/22/2018
  • Est. Priority Date: 07/07/2011
  • Status: Active Grant
First Claim
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1. An electrical connector, comprising:

  • a connector housing;

    one or more connector terminals fitted within the connector housing, which are connected to wiring extending from the connector housing and are coupled to interconnect with corresponding connector terminals in a mating connector; and

    an active shielding circuit, mounted adjacent to the one or more connector terminals within the connector housing and is configured to sense a first magnetic field in a vicinity of the electrical connector and to generate, based on the sensed magnetic field, a second magnetic field that reduces interference induced in the wiring and the one or more connector terminals by the first magnetic field, the active shielding circuit comprising;

    at least one sense coil for sensing the first magnetic field;

    at least one generator coil for generating the second magnetic field; and

    a drive circuit comprising;

    an operational amplifier receiving a first input from a terminal of the at least one sense coil and a second input from a terminal of the at least one generator coil, the operational amplifier capable of amplifying a difference between the first input and the second input;

    an integrator receiving an amplified signal from the operational amplifier, the integrator capable of integrating the amplified signal;

    a low-pass filter receiving the integrated signal from the integrator, the low-pass filter capable of filtering the integrated signal;

    a voltage-to-current (V/I) converter receiving the filtered signal from the low-pass filter, the V/I converter capable of converting a voltage of the filtered signal to a current signal; and

    a current source receiving the current signal from V/I converter, the current source driving the at least one generator coil.

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