Photoelectric conversion device
AssigneeCanon Kabushiki Kaisha
InventorsHiroki Hiyama, Toru Koizumi, Katsuhito Sakurai, Masaru Fujimura
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Abstract
A photoelectric conversion device formed on a single semiconductor substrate, including: a plurality of photoelectric conversion elements; a read-out circuit including a switch for reading out analog signals from the photoelectric conversion elements; a buffer circuit for driving the switch; and a logic circuit for processing digital signals. A first semiconductor area to which a ground level for the buffer circuit is supplied and a second semiconductor area to which a ground level for the logic circuit is supplied are electrically separated from each other.
Claims13
A photoelectric conversion apparatus including a single semiconductor substrate on which are arranged a plurality of photoelectric conversion elements, a read-out circuit unit that reads out analog signals from said plurality of photoelectric conversion elements, a buffer circuit unit that drives a switch included in said read-out circuit unit, and a logic circuit unit that processes a digital signal to supply a pulse to said buffer circuit unit, said apparatus comprising:
- a second semiconductor area of a first conductivity type, formed in a first semiconductor area of said first conductivity type to which a ground level for said buffer circuit unit is supplied;
- and
- a fourth semiconductor area of said first conductivity type, formed in a third semiconductor area of said first conductivity type to which a ground level for said logic circuit unit is supplied,
- wherein said first semiconductor area and said third semiconductor area are separated from each other by a fifth semiconductor area of a second conductivity type, and
- wherein said logic circuit unit is connected to said buffer circuit unit, and said buffer circuit unit is connected to said switch included in said read-out circuit unit.
A photoelectric conversion apparatus including a single semiconductor substrate on which are arranged a plurality of photoelectric conversion elements, a read-out circuit unit that reads out analog signals from said plurality of photoelectric conversion elements, a buffer circuit unit that drives a switch included in said read-out circuit unit, and a logic circuit unit that processes a digital signal to supply a pulse to said buffer circuit unit, said apparatus comprising:
- a second semiconductor area of a first conductivity type, formed in a first semiconductor area of the first conductivity type to which a power supply level for said buffer circuit unit is supplied;
- and
- a fourth semiconductor area of said first conductivity type, formed in a third semiconductor area of said first conductivity type to which a power supply level for said logic circuit unit is supplied,
- wherein said first semiconductor area and said third semiconductor area are separated from each other by a fifth semiconductor area of a second conductivity type, and
- wherein said logic circuit unit is connected to said buffer circuit unit, and said buffer circuit unit is connected to said switch included in said read-out circuit unit.
A photoelectric conversion apparatus including a single semiconductor substrate on which are arranged a plurality of photoelectric conversion elements, a read-out circuit unit that reads out analog signals from said plurality of photoelectric conversion elements, a buffer circuit unit that drives a switch included in said read-out circuit unit, and a logic circuit unit that processes a digital signal to supply a pulse to said buffer circuit unit, said apparatus comprising:
- a second semiconductor area of a first conductivity type, formed in a first semiconductor area of said first conductivity type to which a ground level for said buffer circuit unit is supplied;
- and
- a fourth semiconductor area of said first conductivity type, formed in a third semiconductor area of said first conductivity type to which a ground level for said logic circuit unit is supplied,
- wherein said first semiconductor area and said third semiconductor area are separated from each other by an insulation area, and
- wherein said logic circuit unit is connected to said buffer circuit unit, and said buffer circuit unit is connected to said switch included in said read-out circuit unit.
A photoelectric conversion apparatus including a single semiconductor substrate on which are arranged a plurality of photoelectric conversion elements, a read-out circuit unit that reads out analog signals from said plurality of photoelectric conversion elements, a buffer circuit unit that drives a switch included in said read-out circuit unit, and a logic circuit unit that processes a digital signal to supply a pulse to said buffer circuit unit, said apparatus comprising:
- a second semiconductor area of a first conductivity type, formed in a first semiconductor area of said first conductivity type to which a power supply level for said buffer circuit unit is supplied;
- and
- a fourth semiconductor area of said first conductivity type, formed in a third semiconductor area of said first conductivity type to which a power supply level for said logic circuit unit is supplied,
- wherein said first semiconductor area and said third semiconductor area are separated from each other by an insulation area, and
- wherein said logic circuit unit is connected to said buffer circuit unit, and said buffer circuit unit is connected to the switch included in said read-out circuit unit.
Dependencies are inferred from the claim text.