Medium transport device, image reading apparatus, and static electricity detection circuit detecting the static electricity of a sheet with an electrode, send the signal supplied from the electrode to a voltage clamp circuit, amplifier circuit and rectifier circuit in order to detect a medium

A medium transport device includes a transport section transporting a medium in a contact manner, an electrode detecting static electricity charged on the medium, and a static electricity detection circuit. The static electricity detection circuit includes a voltage clamp circuit clamping a detectio...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Takamatsu, Seiji, Fukasawa, Yusuke
Format:	Patent
Sprache:	eng
Schlagworte:	CONVEYING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES NATURALLY-OCCURRING ELECTRICITY PACKING PERFORMING OPERATIONS PICTORIAL COMMUNICATION, e.g. TELEVISION STATIC ELECTRICITY STORING TRANSPORTING
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Beschreibung
Zusammenfassung:	A medium transport device includes a transport section transporting a medium in a contact manner, an electrode detecting static electricity charged on the medium, and a static electricity detection circuit. The static electricity detection circuit includes a voltage clamp circuit clamping a detection signal input from the electrode to a predetermined voltage, an amplifier circuit amplifying an output signal of the voltage clamp circuit, a rectifier circuit rectifying an output signal of the amplifier circuit, and a comparator circuit serving as a determination circuit determining whether the medium exists based on an output signal of the rectifier circuit.