| 摘要 |
PROBLEM TO BE SOLVED: To provide a position detector capable of making a gap amount between an object to be detected and a sensor or a voltage level detected by the sensor into an optimum state or more suitable state, with respect to a different size of the object to be detected.SOLUTION: When a gain value Gain (256) extracted on the basis of information on the number (size) of repeated patterns of an object to be detected that is transmitted by a controller 109 at initialization is input from a memory unit 103, variable gain amplifier circuits 101a, 101b set the gain value, and then, amplifies a signal level detected by detection elements 301a-301p. |
