Patent ID: 11882374
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A semiconductor device comprising:
an amplifier portion;
a conversion portion; and
an input terminal,
wherein the amplifier portion includes a comparison circuit, a first capacitor, a second capacitor, and a first switch,
wherein the comparison circuit includes an inverting input terminal, a non-inverting input terminal, and an output terminal,
wherein a first signal and a second signal are sequentially supplied to the input terminal,
wherein one terminal of the first capacitor is electrically connected to the input terminal,
wherein the other terminal of the first capacitor is electrically connected to the inverting input terminal,
wherein the second capacitor and the first switch are each electrically connected in parallel with the inverting input terminal and the output terminal,
wherein in the amplifier portion, when the first signal is supplied, the first switch is turned on and a first reference potential is supplied to the non-inverting input terminal, and when the second signal is supplied, the first switch is turned off and a second reference potential that is different from the first reference potential is supplied to the non-inverting input terminal, and
wherein the conversion portion is configured to convert a potential output from the output terminal into a digital value.