| CPC H04N 1/00628 (2013.01) [H04N 1/00013 (2013.01); H04N 1/00037 (2013.01); H04N 1/00082 (2013.01); H04N 1/00602 (2013.01); H04N 1/00615 (2013.01)] | 9 Claims |
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1. A multi-feed detection device, comprising:
a transmission element configured to transmit a signal for detecting multi-feed of a medium;
a reception element configured to receive a signal for detecting multi-feed of the medium;
a drive circuit configured to output a drive signal to the transmission element; and
a control circuit configured to detect multi-feed of the medium based on a signal received by the reception element, wherein
the drive circuit includes:
a conversion circuit configured to convert a reference signal into a converted signal,
a booster circuit configured to boost the converted signal that was converted by the conversion circuit,
a first adjustment circuit configured to adjust rising time of the converted signal that was boosted by the booster circuit to be longer,
a push-pull circuit that outputs a drive signal obtained by amplifying current of the converted signal that was adjusted by the first adjustment circuit, and
a second adjustment circuit configured to adjust the converted signal to be input to the push-pull circuit,
the converted signal that was converted by the conversion circuit is a signal whose voltage level is inverted compared with the reference signal,
the push-pull circuit includes a first N-type MOSFET and a second N-type MOSFET, and is a circuit wherein a source terminal of the first N-type MOSFET and a drain terminal of the second N-type MOSFET are coupled to each other,
the drive circuit is a circuit in which the converted signal that was adjusted by the first adjustment circuit is input to a gate terminal of the first N-type MOSFET and the reference signal is input to a gate terminal of the second N-type MOSFET, and
the second adjustment circuit advances a falling timing of the converted signal to be input to the gate terminal of the first N-type MOSFET.
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