| 摘要 |
<p>PURPOSE: A tablet with a touch pad function is provided to sense an access or contact of a pointer with a oscillation circuit in a sensing area and a touch of a user finger at the same time by having an antennas which can sense a pointer and a finger. CONSTITUTION: A first line antennas(11) is arranged in a sensitive area. A first comparator(41) outputs a comparison voltage between a second output connected to a first loop antenna(15) and a first output which is generated when resonance circuit of a pointer approaches to the first line antenna.</p> |
