Data integrity via galvanically isolated analog-to-digital converter for industrial systems
AssigneeInfineon Technologies Austria AG
InventorsRenato Bessegato, Mohit Berry
Life of this patent
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Abstract
Devices, systems, and methods for verifying integrity of a signal path across an isolation barrier are discloses. The devices, systems, and methods insert a marker signal into the signal path across the isolation barrier. The marker includes an analog signal. The devices, systems, and methods transmit a version of the marker signal across the isolation barrier and receiving a signal comprising the transmitted version of the marker signal. The devices, systems, and methods verify the integrity of the signal path based on the received signal.
Claims13
A method comprising:
- by an electronic device for verifying integrity of a signal path across an isolation barrier,
- inserting a marker signal into the signal path across the isolation barrier by multiplexing the marker signal and at least one other input signal into the signal path, the marker signal comprising a known direct current (DC) voltage, in response to detection of an amplitude modulated clock signal that is transmitted across the isolation barrier;
- transmitting, as a first signal, the marker signal across the isolation barrier;
- receiving, as a second signal, the marker signal as transmitted across the isolation barrier;
- and
- verifying the integrity of the signal path by comparing the first signal and the second signal and determining that a difference of a property of the marker signal that is comparable between the first signal and the second signal is within specification limit.
An electronic device for verifying integrity of a signal path across an isolation barrier, the electronic device comprising:
- circuitry for inserting a marker signal into the signal path across the isolation barrier, in response to detection of an amplitude modulated clock signal that is transmitted across the isolation barrier, by multiplexing the marker signal and at least one other input signal into the signal path, the marker comprising a known direct current (DC) voltage;
- circuitry for transmitting, as a first signal, the marker signal across the isolation barrier;
- circuitry for receiving, as a second signal, the marker signal as transmitted across the isolation barrier;
- and
- circuitry for verifying the integrity of the signal path by comparing the first signal and the second signal and determining that a difference of a property of the marker signal that is comparable between first signal and the second signal is within specification limit.
An electronic device for verifying integrity of a signal path across an isolation barrier, the electronic device comprising:
- means for inserting a marker signal into the signal path across the isolation barrier in response to detection of a clock signal that is amplitude modulated and that is transmitted across the isolation barrier as a command for inserting the marker signal into the signal path across the isolation barrier, the marker comprising an analog signal;
- means for transmitting, as a first signal, the marker signal across the isolation barrier;
- means for receiving, as a second signal, the marker signal as transmitted across the isolation barrier;
- and
- means for verifying the integrity of the signal path by comparing the first signal and the second signal and determining that a difference of a property of the marker signal that is comparable between the first signal and the second signal is within specification limit.
Dependencies are inferred from the claim text.