Device and method for monitoring a voltage supply for a vehicle system
First Claim
1. A device for monitoring a voltage supply for a vehicle system, comprising:
- at least one comparison device which compares at least one of an output voltage of the voltage supply and a voltage derived from the output voltage as a first input signal to a predefined threshold voltage as a second input signal, and outputs a resulting comparison signal to a reset device which generates at least one reset signal as a function of the comparison signal; and
means for performing a self-diagnostic function which (i) evaluates a logic state of the comparison signal which is output by the comparison device and (ii) evaluates a logic state of the reset signal, wherein the self-diagnostic function recognizes a malfunction of the comparison device when the evaluated logic state of the comparison signal does not match an expected logic state, and wherein the self-diagnostic function recognizes a malfunction of the reset device when the evaluated logic state of the reset signal does not match an expected logic state.
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Accused Products
Abstract
A device for monitoring a voltage supply for a vehicle system includes a self-diagnostic function which evaluates a logic state of the comparison signal which is output by a comparison device as a function of an input signal, and checks whether a reset signal which corresponds to the output comparison signal is generatable. The self-diagnostic function recognizes a malfunction of the comparison device when the evaluated logic state of the comparison signal does not match an expected logic state. The self-diagnostic function recognizes a malfunction of the reset device when the checked logic state of the reset signal does not match an expected logic state.
6 Citations
10 Claims
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1. A device for monitoring a voltage supply for a vehicle system, comprising:
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at least one comparison device which compares at least one of an output voltage of the voltage supply and a voltage derived from the output voltage as a first input signal to a predefined threshold voltage as a second input signal, and outputs a resulting comparison signal to a reset device which generates at least one reset signal as a function of the comparison signal; and means for performing a self-diagnostic function which (i) evaluates a logic state of the comparison signal which is output by the comparison device and (ii) evaluates a logic state of the reset signal, wherein the self-diagnostic function recognizes a malfunction of the comparison device when the evaluated logic state of the comparison signal does not match an expected logic state, and wherein the self-diagnostic function recognizes a malfunction of the reset device when the evaluated logic state of the reset signal does not match an expected logic state. - View Dependent Claims (2, 3, 4, 5)
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6. A method for monitoring a voltage supply for a vehicle system, comprising:
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comparing, by a comparison device, at least one of an output voltage of the voltage supply and a voltage derived from the output voltage as a first input signal to a predefined threshold voltage as a second input signal to generate a resulting comparison signal; generating, by a reset device, at least one reset signal as a function of the comparison signal; and performing a self-diagnostic function which (i) evaluates a logic state of the comparison signal which is output by the comparison device and (ii) evaluates a logic state of the reset signal, wherein the self-diagnostic function recognizes a malfunction of the comparison device when the evaluated logic state of the comparison signal does not match an expected logic state, and wherein the self-diagnostic function recognizes a malfunction of the reset device when the evaluated logic state of the reset signal does not match an expected logic state. - View Dependent Claims (7, 8, 9, 10)
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Specification