To provide a ramp signal generation circuit and an electro-optical device with low power consumption.

As a first process a single-throw switch S0 is closed, and for double-throw switches S1-u, S1-d, S2 a terminal a and a common terminal are closed. As a second process, the single-throw switch S0 is opened, and for the double throw switches S1-u, S1-d, S2 the terminal a and the common terminal are closed. As a third process, for the double-throw switches S1-u, S1-d, S2 a terminal b and the common terminal are closed. Thereafter, the second and third processes are repeated.