| 摘要 |
<p>Electronic game apparatus for determining the presence and optionally the identity of playing pieces. Each playing piece (10) is provided with a resonator circuit, which may be tuned so that each playing piece or type of piece has a unique resonant frequency. The board is provided with transmit and receive coils (4, 6), to stimulate the resonator circuit of a piece and to sense the resonant signal respectively. An amplifier is provided between the two sets of coils to amplify the signal around the loop. A resonant signal results if a playing piece is placed on the square being tested. The frequency of this signal is detected and may then be determined and the piece identified.</p> |
