Article Overview

The current transfer ratio (CTR) of an optocoupler is defined as the ratio of the output current (I_C) to the input current (I_F), expressed as a percentage. It is calculated using the formula: CTR = (I_C / I_F) x 100%. This parameter is crucial as it indicates the efficiency of the optocoupler in transferring input current to output current, similar to the DC current amplification ratio of a transistor . The CTR is an important specification for evaluating the performance of optocouplers in various applications .

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