MEASUREMENT AND CONTROL OF ELECTROMAGNETIC INTERFERENCE
First Claim
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1. A method, comprising:
- continuously varying an electrical impedance at one or more termination locations between first and second substructures that radiate electromagnetic noise to continuously vary the amplitude of the electromagnetic noise at a particular frequency.
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Abstract
The average EMR emissions of an electronic device may be reduced by implementing an electrically-active modulated termination. For example, the impedance may be continuously varied at one or more termination locations between two metal substructures to cause a like variation in the amplitude of each component of the EMR. According to one approach, cyclically varying the electrical impedance with a period of less than the time interval over which the EMR is measured will result in a reduction in the average measured EMR.
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Citations
14 Claims
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1. A method, comprising:
continuously varying an electrical impedance at one or more termination locations between first and second substructures that radiate electromagnetic noise to continuously vary the amplitude of the electromagnetic noise at a particular frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic system, comprising:
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a signal generator for generating an electronic signal; a first metal substructure and a second metal substructure electrically coupled to the electrical signal generator for radiating electromagnetic noise from the signal generator; and an impedance controller for continuously varying the impedance at one or more termination locations between the two metal substructures to continuously vary the amplitude of the electromagnetic noise at a particular frequency of the electromagnetic noise. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification