| US 7,495,701 B2 | ||
| Imaging system capable of setting sensitivity | ||
| Nobuyuki Furukawa, Ichikawa (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Apr. 11, 2005, as Appl. No. 11/103,085. | ||
| Claims priority of application No. 2004-122079 (JP), filed on Apr. 16, 2004. | ||
| Prior Publication US 2005/0231622 A1, Oct. 20, 2005 | ||
| Int. Cl. H04N 5/225 (2006.01) | ||
| U.S. Cl. 348—308 [348/300; 348/302; 348/310; 250/208.1] | 1 Claim |
| 1. An imaging system comprising:
a plurality of pixels, each including:
a photoelectric transducer converting an optical signal into signal charge;
a charge transfer device transferring the signal charge converted by the photoelectric transducer;
an amplifying device amplifying the signal charge transferred from the photoelectric transducer by the charge transfer device
and outputting the amplified signal charge to an output line; and
a reset switch used for resetting the voltage of an input terminal of the amplifying device; and
a control circuit for switching a reset voltage supplied through the reset switch in accordance with a sensitivity set in
the imaging system,
wherein the control circuit sets a first reset voltage when the set sensitivity is higher than or equal to a predetermined
value and sets a second reset voltage, which is higher than the first reset voltage, when the set sensitivity is lower than
the predetermined value.
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