Semiconductor device

A semiconductor device comprising a programmable circuit, the programmable circuit including:

• an input signal line,
• an output signal line;
• a column of unit cells comprising unit cells, each of the unit cells comprising:
• an analog element;
• a first transistor comprising an oxide semiconductor in a channel formation region, a first source electrode, a first drain electrode, and a first gate electrode;
• and
• a second transistor comprising a second source electrode, a second drain electrode, and a second gate electrode, the second gate electrode being electrically connected to one of the first source electrode and the first drain electrode, and one of the second source electrode and the second drain electrode being electrically connected to the analog element,
• wherein, for each unit cell, the analog element and the second transistor are connected in series between the input signal line and the output signal line.

A semiconductor device comprising a programmable circuit, the programmable circuit including:

• an input signal line,
• an output signal line;
• a row of unit cells comprising at least a first unit cell and a second unit cell, each of the unit cells comprising:
• an analog element;
• a first transistor comprising an oxide semiconductor in a channel formation region, a first source electrode, a first drain electrode, and a first gate electrode;
• and
• a second transistor comprising a second source electrode, a second drain electrode, and a second gate electrode, the second gate electrode being electrically connected to one of the first source electrode and the first drain electrode, and one of the second source electrode and the second drain electrode being electrically connected to the analog element,
• wherein the analog elements and the second transistors of the unit cells are connected in series between the input signal line and the output signal line.