Back Impedància d'entrada Catalan Eingangswiderstand German Impedancia de entrada Spanish امپدانس ورودی FA עכבת כניסה HE निवेश प्रतिबाधा HI 入力インピーダンス Japanese 입력 임피던스 Korean Mateimpedans NB Impedancja wejściowa Polish
In electrical engineering, the input impedance of an electrical network is the measure of the opposition to current (impedance), both static (resistance) and dynamic (reactance), into a load network or circuit that is external to the electrical source network. The input admittance (the reciprocal of impedance) is a measure of the load network's propensity to draw current. The source network is the portion of the network that transmits power, and the load network is the portion of the network that consumes power.
For an electrical property measurement instrument like an oscilloscope, the instrument is a load circuit to an electrical circuit (source circuit) to be measured, so the input impedance is the impedance of the instrument seen by the circuit to be measured.
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