Semiconductor device and electronic device

A semiconductor device comprising:

• an integrated circuit comprising a first transistor over a single crystal semiconductor substrate, the first transistor including a first channel formation region provided in the single crystal semiconductor substrate;
• an insulating layer over the integrated circuit;
• a memory circuit comprising a second transistor over the insulating layer, the second transistor including a second channel formation region provided in a first oxide semiconductor layer;
• an amplifier circuit comprising a third transistor over the insulating layer, the third transistor including a third channel formation region provided in a second oxide semiconductor layer,
• wherein the memory circuit and the amplifier circuit are electrically connected to each other,
• wherein the amplifier circuit and the integrated circuit are electrically connected to each other, and
• wherein the integrated circuit and one of the memory circuit and the amplifier circuit comprise mutually overlapping regions.

A semiconductor device comprising:

• an integrated circuit comprising a first transistor over a single crystal semiconductor substrate, the first transistor including a first channel formation region provided in the single crystal semiconductor substrate;
• a first insulating layer over the integrated circuit;
• a memory circuit comprising a second transistor over the first insulating layer, the second transistor including a second channel formation region provided in a first oxide semiconductor layer;
• a second insulating layer over the memory circuit;
• and
• an amplifier circuit comprising a third transistor over the second insulating layer, the third transistor including a third channel formation region provided in a second oxide semiconductor layer,
• wherein the memory circuit and the amplifier circuit are electrically connected to each other,
• wherein the amplifier circuit and the integrated circuit are electrically connected to each other, and
• wherein the integrated circuit, the memory circuit, and the amplifier circuit comprise mutually overlapping regions.