| 摘要 |
A method and device for detecting a coin, wherein one of a plurality of coils (1a, 1b, 1c) is selectively connected to an oscillation unit (4) via a switching unit (2) and a coin is detected based on an output from an oscillation circuit comprising the connected coil (one of 1a, 1b, 1c) and the oscillation unit (4).
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