The present invention provides a small-sized capacitor module for use in an inverter, which is capable of suppressing the occurrence of unwanted inductance components in an electric connection path and which is suitable for a large current use. A simple, low cost pseudo-noise generating circuit is disclosed that, when connected to the signal conditioning circuitry of AD conversion circuit, adds pseudo-noise to an analog input voltage signal. A second tubular member is then plastically deformed and radially expanded in overlapping relation to the first tubular member. Movement of the valve slide from the first position to the second position engages an actuator device to activate a switch on the timer to start the timer running for a pre-programmed time period.