Semiconductor device, display device, and electronic device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorKei Takahashi
Life of this patent
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Abstract
A semiconductor device in which variations are controlled is provided. The semiconductor device has a function of converting a digital signal into an analog signal, and includes a digital-analog converter circuit, an amplifier circuit, first to fourth switches, a first output terminal, a second output terminal, and a power source. The amplifier circuit is configured to perform feedback control when the first switch and the fourth switch are on and the second switch and the third switch are off. The amplifier circuit is configured to perform comparison control when the first switch and the fourth switch are off and the second switch and the third switch are on; utilizing this, variations in the digital-analog converter circuit and the amplifier circuit are controlled.
Claims11
A method for driving a semiconductor device comprising a digital-analog converter circuit, an amplifier circuit, first to fourth switches, an input terminal, a first output terminal, and a second output terminal comprising:
- performing feedback control by the amplifier circuit when the first switch and the fourth switch are on and the second switch and the third switch are off;
- and
- performing comparison control by the amplifier circuit when the first switch and the fourth switch are off and the second switch and the third switch are on,
- wherein an output terminal of the digital-analog converter circuit is electrically connected to a non-inverting input terminal of the amplifier circuit,
- wherein one terminal of the first switch is electrically connected to an inverting input terminal of the amplifier circuit,
- wherein the other terminal of the first switch is electrically connected to an output terminal of the amplifier circuit,
- wherein one terminal of the second switch is electrically connected to the inverting input terminal of the amplifier circuit,
- wherein the other terminal of the second switch is electrically connected to the input terminal,
- wherein one terminal of the third switch is electrically connected to the output terminal of the amplifier circuit,
- wherein the other terminal of the third switch is electrically connected to the second output terminal,
- wherein one terminal of the fourth switch is electrically connected to the output terminal of the amplifier circuit,
- wherein the other terminal of the fourth switch is electrically connected to the first output terminal, and
- wherein the other terminal of the second switch is not electrically connected to the other terminal of the fourth switch.
A method for driving a semiconductor device comprising a digital-analog converter circuit, an amplifier circuit, first to third switches, an input terminal, and an output terminal comprising:
- performing feedback control by the amplifier circuit when the first switch is on and the second switch and the third switch are off;
- and
- performing comparison control by the amplifier circuit when the first switch is off and the second switch and the third switch are on,
- wherein an output terminal of the digital-analog converter circuit is electrically connected to a non-inverting input terminal of the amplifier circuit,
- wherein one terminal of the first switch is electrically connected to an inverting input terminal of the amplifier circuit,
- wherein the other terminal of the first switch is electrically connected to an output terminal of the amplifier circuit,
- wherein one terminal of the second switch is electrically connected to the inverting input terminal of the amplifier circuit,
- wherein the other terminal of the second switch is electrically connected to the input terminal,
- wherein one terminal of the third switch is electrically connected to the output terminal of the amplifier circuit,
- wherein the other terminal of the third switch is electrically connected to the output terminal, and
- wherein the other terminal of the second switch is not electrically connected to the output terminal of the amplifier circuit.
A method for driving a semiconductor device comprising a digital-analog converter circuit, an amplifier circuit, first to fifth switches, an input terminal, a first output terminal, and a second output terminal comprising:
- performing feedback control by the amplifier circuit when the first switch and the fourth switch are on and the second switch, the third switch, and the fifth switch are off;
- and
- performing comparison control by the amplifier circuit when the first switch and the fourth switch are off and the second switch, the third switch, and the fifth switch are on,
- wherein an output terminal of the digital-analog converter circuit is electrically connected to a non-inverting input terminal of the amplifier circuit,
- wherein one terminal of the first switch is electrically connected to an inverting input terminal of the amplifier circuit,
- wherein the other terminal of the first switch is electrically connected to an output terminal of the amplifier circuit,
- wherein one terminal of the second switch is electrically connected to the inverting input terminal of the amplifier circuit,
- wherein the other terminal of the second switch is electrically connected to the input terminal,
- wherein one terminal of the third switch is electrically connected to the output terminal of the amplifier circuit,
- wherein the other terminal of the third switch is electrically connected to the second output terminal,
- wherein one terminal of the fourth switch is electrically connected to the output terminal of the amplifier circuit,
- wherein the other terminal of the fourth switch is electrically connected to one terminal of the fifth switch and the first output terminal, and
- wherein the other terminal of the second switch is not electrically connected to the other terminal of the fourth switch.
Dependencies are inferred from the claim text.