Voltage diagnostic circuit
AssigneeWAGO Verwaltungsgesellschaft mbH
InventorsChristopher Wohlgemuth, Christian Voss
Life of this patent
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Abstract
A circuit for monitoring an output voltage of a voltage supply is shown. The circuit comprises a microcontroller for controlling a system, a shift register and a diagnostic circuit. The microcontroller has an input for receiving serial output data of the shift register, wherein the input is connected to the serial output of the shift register. The diagnostic circuit is designed to diagnose the voltage supply and has a diagnostic output which is connected to a data input of the shift register for inputting a diagnostic bit.
Claims16
A circuit comprising:
- a microcontroller to control a system;
- a shift register;
- and
- a diagnostic circuit;
- wherein the microcontroller is connected to a first voltage supply and has an input for receiving serial output data of the shift register, the input being connected to a serial output of the shift register,
- wherein the shift register has at least one data input, and
- wherein the diagnostic circuit diagnoses a second voltage supply and a diagnostic output of the diagnostic circuit is connected to a data input of the shift register for inputting a diagnostic bit.
A method for monitoring an output voltage of a voltage supply, the method comprising:
- monitoring whether the output voltage is in a target voltage range;
- signaling a result of the monitoring to a microcontroller;
- and
- writing a bit value symbolizing the result into a readout position of a shift register, which is read out first by the microcontroller via a serial interface of the shift register.
Dependencies are inferred from the claim text.