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THE HOW AND WHY OF OBTAINING ACCURATE …
www.speedingedge.comSpeeding Edge, Spring 2003 SLIDE # 2 WHAT IS IMPEDANCE? • Impedance is the resistance to the flow of energy in a transmission line. • At low frequencies, it is primarily the DC resistance of the bulk copper and is relatively small in PCB traces. • At high frequencies it is primarily reactive and substantially higher than the DC or low frequency