| 摘要 |
An information input device using an electromagnetic near field to input information for an information equipment which a user is carrying. In a keyboard 12, a keycode (an output from a processor 2) is frequency modulated (FSK) by a modulator 5, only necessary carrier component passes through a filter 6, and then supplied to conductive keytops 4 via a buffer amplifier 7. The supplied signal is received at a preamplifier 10 installed in user's wearable equipment 9 using a surface of a human body and an electromagnetic near field, and then supplied to a wearable computer 11 of the wearable equipment 9 after demodulation.
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