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  • Sinewave Tracking (.pdf)
    Many SPDs include noise filtering, also known as EMI/RFI filtering. These filters attenuate higher frequency noise signals on power lines. From an engineering perspective, these are basic, first order low-pass filters. The intent is to allow 'low-frequency' 50-60Hz power to 'pass', but not high
  • Triggering and Gate Characteristics of Thyristors (.pdf)
    it from propagating away from its source or keeping it from impinging on a sensitive load is accomplished with ¬lters inserted in series within a circuit. The ¬lter, generally of the low-pass type, attenuates the transient (high frequency) and allows the signal or power ow (low-frequency) to continue
  • Transient Suppression Devices & Principles (.pdf)
    it from propagating away from its source or keeping it from impinging on a sensitive load is accomplished with filters inserted in series within a circuit. The filter, generally of the low-pass type, attenuates the transient (high frequency) and allows the signal or power flow (low-frequency

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