Patent ID: 6324046
Filing Date: 2001-11-27
Classification: F23N,H01F

Abstract:
Actuator circuit for electrically actuating a dual-solenoid gas valve on a gas line, in which a first gas-valve solenoid and a second gas-valve solenoid are both energized to open the gas valve to supply a burner; comprising:a controller circuit for selectively providing output pulses at an output terminal having a first state at which pulses are present and a second state in which pulses are absent;a switch device having a control electrode coupled to the output terminal of said controller circuit and an output electrode connected to said first gas-valve solenoid to supply drive pulses thereto to open a first valve element on said gas line; anda flyback-driven relaxation oscillator circuit having an input coupled to a junction of said first gas-valve solenoid and the output electrode of said switch device to receive flyback voltage from said first gas-valve solenoid, and an output connected to said second gas-valve solenoid to provide drive pulses thereto to open a second valve element in tandem with said first valve element on said gas line.