Patent ID: 11948945
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. The wireless communication device according to claim 4,
wherein the analog-digital converter circuit comprises a comparison circuit,
wherein the comparison circuit comprises a differential amplifier circuit and an offset correction circuit,
wherein the differential amplifier circuit comprises an output terminal and an inverted output terminal,
wherein the offset correction circuit comprises a constant current circuit and a ninth transistor to a twelfth transistor,
wherein one of a source and a drain of the ninth transistor is electrically connected to the output terminal,
wherein one of a source and a drain of the tenth transistor is electrically connected to the inverted output terminal,
wherein one of a source and a drain of the eleventh transistor is electrically connected to a gate of the ninth transistor,
wherein one of a source and a drain of the twelfth transistor is electrically connected to a gate of the tenth transistor, and
wherein the eleventh transistor and the twelfth transistor each comprise a semiconductor layer comprising an oxide semiconductor in a channel formation region.