Patent ID: 7654564

Claim:
A controller that controls activation of an occupant protection device for a vehicle, the controller comprising: a first sensor that detects a movement of the vehicle and outputs a first signal indicative of the movement of the vehicle; a second sensor operable independently of the first sensor, the second sensor detecting the movement of the vehicle and outputting a second signal indicative of the movement of the vehicle; a main control circuit including a central processing unit that has a first check circuit for determining based on the first signal whether a first condition is met and a second check circuit for determining based on the second signal whether a second condition is met, the main control circuit outputting a main control signal when both the first condition and the second condition are met; a sub control circuit including a comparator that compares the first signal with a first threshold value, the sub control circuit outputting a sub control signal based on a result of the comparison; and a trigger signal output circuit that outputs a trigger signal for activating the occupant protection device upon receipt of both the main control signal and the sub control signal.