Electrical over stress (EOS) monitor
First Claim
1. An apparatus for testing an integrated circuit, comprising:
- a spike source configured to be coupled to an input of an integrated circuit and responsively provide a signal spike to the input;
a current sensor configured to couple to a power supply, the power supply coupled to the integrated circuit to provide power to the integrated circuit, the current sensor providing a sensor output related to the current supplied to the integrated circuit from the power supply; and
diagnostic circuitry coupled to the sensor output configured to provide a failure output in response to a characteristic increase in power supply current sensed by the current sensor in response to an applied signal spike.
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Accused Products
Abstract
An apparatus and associated method for testing an integrated circuit for electrical over stress includes a spike source configured to couple to an input of the integrated circuit, and responsively provide a signal spike to the input, and a current sensor configured to couple to a power supply. The power supply is coupled to the integrated circuit to provide power to the integrated circuit. The current sensor provides a sensor output related to the current supply to the integrated circuit from the power supply. The apparatus also includes test circuitry coupled to the sensor output configured to provide a failure output in response to a characteristic increase in power supply current sensed by the current sensor in response to an applied signal spike.
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Citations
19 Claims
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1. An apparatus for testing an integrated circuit, comprising:
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a spike source configured to be coupled to an input of an integrated circuit and responsively provide a signal spike to the input;
a current sensor configured to couple to a power supply, the power supply coupled to the integrated circuit to provide power to the integrated circuit, the current sensor providing a sensor output related to the current supplied to the integrated circuit from the power supply; and
diagnostic circuitry coupled to the sensor output configured to provide a failure output in response to a characteristic increase in power supply current sensed by the current sensor in response to an applied signal spike. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for testing an integrated circuit, comprising the steps of:
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coupling the integrated circuit to the power supply;
applying a signal spike to an input of the integrated circuit;
sensing a power supply current from the power supply coupled to the integrated circuit; and
providing a failure output in response to a characteristic increase in the power supply current sensed in response to the applied signal spike. - View Dependent Claims (14, 15, 16, 18, 19)
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17. An apparatus for testing an integrated circuit for electrical over stress, comprising:
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a spike signal generating means for applying an electrical transient to an input of the integrated circuit;
a current sensing means for sensing a power supply current on a characteristic power supply line from a power supply to the integrated circuit;
a diagnostic means for providing a failure output in response to a signal received from the current sensing means indicating an increase in the power supply current sensed by the current sensing means in response to an applied electrical transient.
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Specification