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

Claim 3:
4. A wireless communication device comprising:
an integrated circuit comprising an antenna, a mixer, an oscillator, and an analog-digital converter circuit,
wherein the oscillator comprises:
an oscillation circuit comprising a first coil, a second coil, a first capacitor, a second capacitor, a first transistor, and a second transistor; and
a frequency correction circuit comprising a third capacitor, a fourth capacitor, a third transistor, a fourth transistor, and a switching circuit,

wherein the switching circuit is configured to control a conduction state or a non-conduction state of the third transistor and the fourth transistor,
wherein the frequency correction circuit is provided above the oscillation circuit and is configured to adjust an oscillation frequency of the oscillation circuit,
wherein the first transistor and the second transistor each comprise a semiconductor layer comprising silicon in a channel formation region, and
wherein the third transistor and the fourth transistor each comprise a semiconductor layer comprising an oxide semiconductor in a channel formation region.