A switch monitoring device includes a constant current source which supplies a current to an input line or extracts a current from the input line, a switch which connects the input line to a supply voltage or to a ground voltage, a comparator which compares a voltage on the input line with a reference voltage, a logic which receives an output voltage of the comparator, a base current source which generates a base current, and a bias current circuit which generates a bias current by adjusting the base current as a base in accordance with a current control signal from the logic and the output voltage of the comparator. The constant current source generates a current by adjusting the bias current as a base.
Switch monitoring device, switch state detection circuit, and a vehicle-mounted switch system
2021-02-16
Patent
Elektronische Ressource
Englisch
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