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US 2004/0104909 A1Published application
Current signal output circuit and display apparatus and information display apparatus using the current signal output circuit
AssigneeCanon Kabushiki Kaisha
InventorsSomei Kawasaki, Masami Iseki
Life of this patent
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Abstract
The application discloses a current signal output circuit. Particularly, the application discloses a constitution including at least a first switch, a first capacitor element and a first transistor in which a first terminal of the first switch is connected to a voltage signal line for providing a voltage signal, a second terminal of the first switch is connected to a first terminal of the first capacitor element, a second terminal of the first capacitor element is connected to a gate electrode of the first transistor and a first main electrode of the first transistor is connected to a first power source.
Claims29
A current signal output circuit for outputting a current signal in accordance with an inputted voltage signal comprising:
- a current signal control circuit,
- said current signal control circuit comprising:
- at least a first through a sixth switch, a first and a second capacitor element and a first and a second transistor;
- wherein a first terminal of the first switch is connected to a voltage signal line for providing the voltage signal, a second terminal of the first switch is connected to a first terminal of the first capacitor element,
- a second terminal of the first capacitor element is connected to a gate electrode of the first transistor,
- a first terminal and a second terminal of the third switch are respectively connected to the gate electrode and a second main electrode of the first transistor,
- a first main electrode of the first transistor is connected to a first power source, the second main electrode of the first transistor is connected to a first terminal of the fourth switch,
- a first terminal of the second switch is connected to the voltage signal line for providing the voltage signal and a second terminal of the second switch is connected to a first terminal of the second capacitor element,
- a second terminal of the second capacitor element is connected to a gate electrode of the second transistor,
- a first terminal and a second terminal of the fifth switch are respectively connected to a gate electrode and a second main electrode of the second transistor,
- a first main electrode of the second transistor is connected to the first power source,
- the second main electrode of the second transistor is connected to a first terminal of the sixth switch,
- second terminals of the fourth and the sixth switches are connected to each other to constitute a current signal output terminal for outputting the current signal, and
- control terminals of the first through the sixth switches are respectively connected to a first through a sixth control signal line.
11 more elements
A current signal output circuit for outputting a current signal in accordance with an inputted voltage signal comprising:
- a current signal control circuit, said current signal control circuit comprising:
- at least a first through an eighth switch, a first and a second capacitor element and a first through a fourth transistor;
- wherein a first terminal of the first switch is connected to a voltage signal line for providing the voltage signal and a second terminal of the first switch is connected to a first terminal of the first capacitor element,
- a second terminal of the first capacitor element is connected to a gate electrode of the first transistor,
- a first terminal and a second terminal of the third switch are respectively connected to the gate electrode and a second main electrode of the first transistor,
- a first main electrode of the first transistor is connected to a first power source,
- the second main electrode of the first transistor is connected to a first terminal of the fourth switch and a first terminal of the seventh switch,
- a second terminal of the seventh switch is connected to a first main electrode of the third transistor,
- a gate electrode and the first main electrode or a second main electrode of the third transistor are shortcircuited and the second main electrode is connected to a second power source,
- a first terminal of the second switch is connected to the voltage signal line for providing the voltage signal,
- a second terminal of the second switch is connected to a first terminal of the second capacitor element,
- a second terminal of the second capacitor element is connected to a gate electrode of the second transistor,
- a first terminal and a second terminal of the fifth switch are respectively connected to the gate electrode and a second main electrode of the second transistor,
- a first main electrode of the second transistor is connected to the first power source,
- the second main electrode of the second transistor is connected to a first terminal of the sixth switch and a first terminal of the eighth switch,
- a second terminal of the eighth switch is connected to a first main electrode of the fourth transistor,
- a gate electrode and the first main electrode or a second main electrode of the fourth transistor are shortcircuited and the second main electrode is connected to a second power source,
- second terminals of the fourth and the sixth switches are connected to each other to constitute a current signal output terminal for outputting the current signal to outside, and
- control terminals of the first through the eighth switches are respectively connected to a first through an eighth control signal line.
16 more elements
A current signal output circuit for outputting a current signal in accordance with an inputted voltage signal comprising:
- a current signal control circuit, said current signal control circuit comprising:
- at least a first and a third switch, a first capacitor element, and a first transistor;
- wherein a first terminal of the first switch is connected to a voltage signal line for providing the voltage signal, a second terminal of the first switch is connected to a first terminal of the first capacitor element,
- a second terminal of the first capacitor element is connected to a gate electrode of the first transistor,
- a first terminal and a second terminal of the third switch are respectively connected to the gate electrode and a second main electrode of the first transistor, and
- a first main electrode of the first transistor is connected to a first power source.
3 more elements
A current signal output circuit for outputting a current signal in accordance with an inputted voltage signal comprising:
- a current signal control circuit,
- said current signal control circuit comprising:
- at least a first switch, a first capacitor element and a first transistor;
- wherein a first terminal of the first switch is connected to a voltage signal line for providing the voltage signal, a second terminal of the first switch is connected to a first terminal of the first capacitor element,
- a second terminal of the first capacitor element is connected to a gate electrode of the first transistor, and
- the first main electrode of the first transistor is connected to a first power source.
3 more elements
Dependencies are inferred from the claim text.