A semiconductor integrated circuit constituting a part of a sensor signal processing apparatus for processing sensor signal output from a sensor includes: a first terminal where one end of a vibrator externally attached to the semiconductor integrated circuit is connected and a second terminal where the other end of the vibrator is connected; and an oscillation circuit oscillating the vibrator connected via the first and second terminals, wherein the oscillator circuit intermittently oscillating the vibrator based on control signal, wherein a first period where the oscillation circuit oscillates the vibrator and a second period where the oscillation circuit does not oscillate the vibrator are alternately switched, wherein, during the first period, potentials of the first and second terminals are alternately switched complementarily to high level and low level, and wherein, during the second period, the potentials of the first terminal and the second terminal are fixed to the low level.