(EP906524-A1)      The system operates a control circuit (6) in a car. At least one input signal is applied to the circuit and devices (2-4) by which the circuit is activated in reaction to a change of input signal. The activation of the circuit only takes place in an operating state in which the circuit is deactivated.    Especially one controller is provided through whose operation the circuit is brought into the operating state of deactivation. The devices have a first power supply device and a second one (61) is provided by which the control circuit can be supplied with power. In reaction to a change of input signal, the second power supply device is activated in order to activate the control circuit.    USE -   Operational control circuit used especially in hybrid car.    ADVANTAGE -   High operational security for control circuit without excessive power consumption.    (US6084315-A)      The system operates a control circuit (6) in a car. At least one input signal is applied to the circuit and devices (2-4) by which the circuit is activated in reaction to a change of input signal. The activation of the circuit only takes place in an operating state in which the circuit is deactivated.    Especially one controller is provided through whose operation the circuit is brought into the operating state of deactivation. The devices have a first power supply device and a second one (61) is provided by which the control circuit can be supplied with power. In reaction to a change of input signal, the second power supply device is activated in order to activate the control circuit.    USE -   Operational control circuit used especially in hybrid car.    ADVANTAGE -   High operational security for control circuit without excessive power consumption.    (JP2000515955-W)      The system operates a control circuit (6) in a car. At least one input signal is applied to the circuit and devices (2-4) by which the circuit is activated in reaction to a change of input signal. The activation of the circuit only takes place in an operating state in which the circuit is deactivated.    Especially one controller is provided through whose operation the circuit is brought into the operating state of deactivation. The devices have a first power supply device and a second one (61) is provided by which the control circuit can be supplied with power. In reaction to a change of input signal, the second power supply device is activated in order to activate the control circuit.    USE -   Operational control circuit used especially in hybrid car.    ADVANTAGE -   High operational security for control circuit without excessive power consumption.