CARD READER AND CONTROL METHOD FOR CARD READER

A card reader includes a writing coil that is provided to a magnetic head for recording magnetic data in a magnetic card, and a drive circuit that supplies a write current to the writing coil. The drive circuit is a chopping circuit that supplies a chopping current, on/off of which is switched in a...

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Bibliographische Detailangaben
Hauptverfasser:	Gu, YUFEI, SHIMIZU, Yohei, TANAKA, Jo
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING HANDLING RECORD CARRIERS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
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Beschreibung
Zusammenfassung:	A card reader includes a writing coil that is provided to a magnetic head for recording magnetic data in a magnetic card, and a drive circuit that supplies a write current to the writing coil. The drive circuit is a chopping circuit that supplies a chopping current, on/off of which is switched in a specified cycle, as the write current to the writing coil. An on/off cycle of the chopping current is a cycle in which a length of a magnetized pattern in a recording direction is shorter than a reading gap formed in a core around which the writing coil is wound or a core around which a reading coil being separately provided from the writing coil is wound, the magnetized pattern in the recording direction being formed in the magnetic card by the chopping current in a period including one each of the on and the off.