Semiconductor device and electronic device

Abstract

A semiconductor device that has low power consumption and is capable of performing a product-sum operation is provided. The semiconductor device includes first and second cells, a first circuit, and first to third wirings. Each of the first and second cells includes a capacitor, and a first terminal of each of the capacitors is electrically connected to the third wiring. Each of the first and second cells has a function of feeding a current based on a potential held at a second terminal of the capacitor, to a corresponding one of the first and second wirings. The first circuit is electrically connected to the first and second wirings and stores currents I1 and I2 flowing through the first and second wirings. When the potential of the third wiring changes and accordingly the amount of current of the first wiring changes from I1 to I3 and the amount of current of the second wiring changes from I2 to I4, the first circuit generates a current with an amount I1−I2−I3+I4. Note that the potential of the third wiring is changed by firstly inputting a reference potential to the third wiring and then inputting a potential based on internal data or a potential based on information obtained by a sensor.