Imaging device and camera system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMasashi Murakami, Makoto Shouho, Yoshihiro Sato, Kazuko Nishimura, Junji Hirase
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Abstract
An imaging device includes a charge accumulator, a first transistor, and a first capacitive element. The first transistor has a first source, a first drain, and a first gate electrode electrically connected to one of the first source and the first drain. The first capacitive element holds the charges and has a first terminal. A fixed potential is supplied to the other of the first source and the first drain. One of the first source and the first drain is always electrically connected to the first terminal of the first capacitive element from start to end of an exposure period.
Claims20
An imaging device comprising:
- a charge accumulator that accumulates charges generated by photoelectric conversion;
- a first transistor having a first source, a first drain, and a first gate electrode electrically connected to one of the first source and the first drain;
- and
- a first capacitive element that holds the charges and has a first terminal, wherein:
- a fixed potential is supplied to the other of the first source and the first drain, and
- the other of the first source and the first drain is always electrically connected to the first terminal of the first capacitive element from start to end of an exposure period.
An imaging device comprising:
- a charge accumulator that accumulates charges generated by photoelectric conversion;
- a first transistor having a first source, a first drain, and a first gate electrode connected to one of the first source and the first drain;
- and
- a first capacitive element that is separately provided from first transistor and holds the charges and has a first terminal, wherein:
- a fixed potential is supplied to the other of the first source and the first drain,
- the one of the first source and the first drain is always electrically connected to the first terminal of the first capacitive element from start to end of an exposure period, and
- the first gate electrode of the first transistor is connected to the one of the first source and the first drain through the first capacitive element and connected to the charge accumulator, from the start to the end of the exposure period.
An imaging device comprising:
- a charge accumulator that accumulates charges generated by photoelectric conversion;
- a node electrically connected to the charge accumulator;
- and
- a circuit, wherein:
- the circuit includes
- a first transistor having a first source, a first drain, and a first gate electrode electrically connected to one of the first source and the first drain, and
- a first capacitive element that holds the charges and has a first terminal,
- a fixed potential is supplied to the other of the first source and the first drain,
- the other of the first source and the first drain is always electrically connected to the first terminal of the first capacitive element, and
- when a capacitor electrically connected to the node is defined as a charge accumulation capacitor, the circuit changes a capacitance value of the charge accumulation capacitor in response to a change in potential of the charge accumulator.
Dependencies are inferred from the claim text.