| 摘要 |
Disclosed are a medium discrimination apparatus and a discrimination method thereof. If a paper money is introduced through a paper money inlet, first and second magnetic sensors 110a and 110b sense a magnetic component printed on a specific position of the paper money, and delivers analog signals for the magnetic component to first and second amplifier/band-pass filters 120a and 120b. The first and second amplifier/band-pass filters 120a and 120b receive and amplify the analog signals and filter noises contained in the analog signals. A differential AD converter 130 performs a subtraction operation based on two filtered analog signals and then converts a result signal into a digital signal. One digital signal in which most noise is canceled is obtained. A controller 140 reads the digital signal to discriminate if the introduced paper money is genuine or counterfeit. The controller 140 reads one digital signal so that time take to perform operations is reduced. A paper money discriminating ability is improved, and the discriminating time of the paper money is reduced.
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