单词	impedance
释义	impedance /ɪmˈpiːd(ə)ns / noun The effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance. See also acoustic impedance. Impedance is usually expressed as a complex quantity Z = R + jX, where R is resistance, X is reactance, and j is the imaginary square root of −1. The constant impedance is maintained despite changes in temperature and voltage by using two external resistors to hold the impedances for all the I / O pins, which can number hundreds in the larger parts.... An impedance matching circuit is provided for each signal-carrying wire pair of the first and second wire pair sets. The transponder alters the impedance of the tuned circuit in accordance with the coded pattern. Rhymes antecedence, credence
随便看	marked-down markedly marked man markedness marked price marked transfer marker marker bed marker bomb marker crude marker horizon marker pen market marketability marketable marketableness marketably market analysis market analyst market basket market behavior market behaviour market bell market boat market cap

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