ELECTRONIC DEVICE AND METHOD FOR TESTING A CIRCUIT BOARD
First Claim
1. An electronic device comprising:
- a circuit board having a set of input contacts, a set of output contacts and an electrical circuit connected between the input contacts and the output contacts, anda controller,wherein the controller is configured, at least once during operation of the device,to apply a predetermined test signal to the set of input contacts,to tap off a response signal at the set of output contacts,to carry out a signal analysis on the response signal,to compare a result of the signal analysis with an expected value stored in a memory of the controller, andif no match is determined between the signal analysis result and the expected value, to prevent, at least partially, further operation of at least part of the device,wherein the electrical circuit is configured as a passive network having a characteristic transfer function and comprises at least one inductive element comprising a conducting wire looped into a coil around a cut-out in the circuit board which, in an installed condition, is penetrated by a ferromagnetic rod or by a ferromagnetic fastening pin, whereby the inductance of the inductive element in the installed condition differs from the inductance of the inductive element in the uninstalled condition.
4 Assignments
0 Petitions
Accused Products
Abstract
An electronic device, and associated method, provided with a circuit board (10) with a set of input contacts (IN/COM), a set of output contacts (OUT/COM) and an electrical circuit (18) connected between the input contacts (IN/COM) and the output contacts (OUT/COM), and a controller. The controller carries out a real-time test of the circuit board using a test signal introduced into the electrical circuit, the electrical circuit (18) being designed as a passive network having a characteristic transfer function and provided with at least one inductive element, which is formed by a conductor wire (201) wound into a coil around a break (202) in the circuit board (10), which in the assembled condition, is penetrated by a ferromagnetic bar or fixing pin (203), such that the inductance of the inductive element in the assembled state differs from the inductance thereof in the disassembled state.
6 Citations
9 Claims
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1. An electronic device comprising:
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a circuit board having a set of input contacts, a set of output contacts and an electrical circuit connected between the input contacts and the output contacts, and a controller, wherein the controller is configured, at least once during operation of the device, to apply a predetermined test signal to the set of input contacts, to tap off a response signal at the set of output contacts, to carry out a signal analysis on the response signal, to compare a result of the signal analysis with an expected value stored in a memory of the controller, and if no match is determined between the signal analysis result and the expected value, to prevent, at least partially, further operation of at least part of the device, wherein the electrical circuit is configured as a passive network having a characteristic transfer function and comprises at least one inductive element comprising a conducting wire looped into a coil around a cut-out in the circuit board which, in an installed condition, is penetrated by a ferromagnetic rod or by a ferromagnetic fastening pin, whereby the inductance of the inductive element in the installed condition differs from the inductance of the inductive element in the uninstalled condition. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9)
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5. A method for testing a circuit board which comprises a set of input contacts, a set of output contacts and an electrical circuit connected between the input contacts and the output contacts, comprising:
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a) applying a predetermined test signal to the set of input contacts, b) tapping off a response signal at the set of output contacts, c) analyzing the response signal, wherein a controller performs said applying, said tapping and said analyzing at least once during operation of an electronic device which comprises the circuit board, d) comparing a result of the signal analysis with an expected value, and e) if said comparing produces no match between the signal analysis result and the expected value, preventing, at least partially, further operation of at least part of the electronic device, wherein the electrical circuit is configured as a passive network having a characteristic transfer function and comprises at least one inductive element comprising a conducting wire looped into a coil around a cut-out in the circuit board which, in an installed condition, is penetrated by a ferromagnetic rod or by a ferromagnetic fastening pin, whereby the inductance of the inductive element in the installed condition differs from the inductance of the inductive. element in the uninstalled condition.
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Specification