POWER STORAGE DEVICE WITH MONITORING IC

摘要

A battery-monitoring IC with small power consumption is provided. A power storage device includes a storage element and an IC. The IC monitors the electromotive force of the power storage element. The IC includes a bias circuit, a holding circuit, and an amplifier. The holding circuit includes a first transistor and a capacitor. The amplifier includes a second transistor. The bias circuit is electrically connected to a gate of the second transistor through the first transistor. A first terminal of the capacitor is electrically connected to the gate of the second transistor. A first transistor preferably includes an oxide semiconductor in a channel formation region.

主权项

1. A power storage device comprising:
a power storage element; and an integrated circuit comprising a first circuit, a second circuit and an amplifier circuit, the integrated circuit configured to monitor an electromotive force of the power storage element, wherein the first circuit is configured to supply a bias voltage to the amplifier circuit through the second circuit, and wherein the second circuit is configured to hold the bias voltage.