A radiation-hardened electronic system is disclosed. The radiation-hardened electronic system includes a reconfigurable analog circuit block, a digital configuration logic circuit block, and a radiation-hardened isolation latch circuit connecting between the reconfigurable analog circuit block and the digital configuration logic circuit block. The reconfigurable analog circuit block includes multiple analog inputs and outputs. The digital configuration logic circuit block includes multiple digital inputs and outputs for controlling various functionalities of the reconfigurable analog circuit block via a set of configuration data. The radiation-hardened isolation latch circuit prevents the configuration data from entering the reconfigurable analog circuit block when the configuration data has been corrupted by a SEU.

A radiation-hardened electronic system is disclosed. The radiation-hardened electronic system includes a reconfigurable analog circuit block, a digital configuration logic circuit block, and a radiation-hardened isolation latch circuit connecting between the reconfigurable analog circuit block and the digital configuration logic circuit block. The reconfigurable analog circuit block includes multiple analog inputs and outputs. The digital configuration logic circuit block includes multiple digital inputs and outputs for controlling various functionalities of the reconfigurable analog circuit block via a set of configuration data. The radiation-hardened isolation latch circuit prevents the configuration data from entering the reconfigurable analog circuit block when the configuration data has been corrupted by a SEU.

A first circuit has a predetermined function with an output that has a small dependence on a certain operation condition. A second circuit has the same function as that of the first circuit with an output that has a large dependence on the certain operation condition. When the first circuit is operating normally, the main circuit operates according to the output of the first circuit. The main circuit is capable of generating a detection signal that indicates the certain operation condition based on a relative relation between the output of the first circuit and the output of the second circuit.

A first circuit has a predetermined function with an output that has a small dependence on a certain operation condition. A second circuit has the same function as that of the first circuit with an output that has a large dependence on the certain operation condition. When the first circuit is operating normally, the main circuit operates according to the output of the first circuit. The main circuit is capable of generating a detection signal that indicates the certain operation condition based on a relative relation between the output of the first circuit and the output of the second circuit.

Fault detection circuitry and a corresponding method are disclosed. A count value that is indicative of the switching period of a PWM signal is determined and it is determined whether this count value is between a first threshold and a second threshold. An error signal is generated when the switching period is not between the first and the second threshold. A count value that is indicative of the switch-on duration of the PWM signal is determined and compared with a switch-on threshold in order to determine whether the switch-on duration is greater than a maximum switch-on duration. A count value that is indicative of the switch-off duration of the PWM signal is determined and compared with a switch-off threshold in order to determine whether the switch-off duration is greater than a maximum switch-off duration. Error signals can be generated when the durations are greater than the maximum durations.

Fault detection circuitry and a corresponding method are disclosed. A count value that is indicative of the switching period of a PWM signal is determined and it is determined whether this count value is between a first threshold and a second threshold. An error signal is generated when the switching period is not between the first and the second threshold. A count value that is indicative of the switch-on duration of the PWM signal is determined and compared with a switch-on threshold in order to determine whether the switch-on duration is greater than a maximum switch-on duration. A count value that is indicative of the switch-off duration of the PWM signal is determined and compared with a switch-off threshold in order to determine whether the switch-off duration is greater than a maximum switch-off duration. Error signals can be generated when the durations are greater than the maximum durations.

A device includes a sensor and an actuator. The sensor has a receiving circuit with a sensor and a detector, as well as a computer connected to the detector. The sensor cooperates with the actuator to generate a first receiving circuit signal during a normal operation when a switching distance between the sensor and the actuator is undershot. The detector generates a first output signal as a function of the first receiving circuit signal, and to transmit transmits the first output signal to the computer. The receiving circuit includes a signal emulator and a switch-over element. The signal emulator generates a second receiving circuit signal during a test operation. The detector generates a second output signal as a function of the second receiving circuit signal and transmits the second output signal to the computer. The device can repeatedly switch between normal operation and test operation.

A monitoring device includes a monitoring part configured to detect an abnormality of a monitoring target, a self-diagnosis part configured to diagnose whether or not the monitoring part operates normally during a period from a startup time point of a power supply to an elapse time point at which a reset release waiting time elapses, and a reset control part configured to release a reset of a reset output signal on or after the elapse time point.

A signal transmission device that transmits a driving signal for a power transistor from a primary circuit system to a secondary circuit system while isolating between the primary and secondary circuit systems includes: a first fault detection circuit configured to detect a fault in the primary circuit system; a second fault detection circuit configured to detect a fault in the secondary circuit system; a first signal transmission path configured to transmit the result of detection by the second fault detection circuit from the secondary circuit system to the primary circuit system while isolating between the primary and secondary circuit systems; and a self-test circuit configured to perform a self-test on each of the first fault detection circuit, the second fault detection circuit, and the first signal transmission path.

Fault detection circuitry and a corresponding method are disclosed. A count value that is indicative of the switching period of a PWM signal is determined and it is determined whether this count value is between a first threshold and a second threshold. An error signal is generated when the switching period is not between the first and the second threshold. A count value that is indicative of the switch-on duration of the PWM signal is determined and compared with a switch-on threshold in order to determine whether the switch-on duration is greater than a maximum switch-on duration. A count value that is indicative of the switch-off duration of the PWM signal is determined and compared with a switch-off threshold in order to determine whether the switch-off duration is greater than a maximum switch-off duration. Error signals can be generated when the durations are greater than the maximum durations.