DEGRADATION DIAGNOSING CIRCUIT AND DEGRADATION DIAGNOSING METHOD
First Claim
1. A degradation diagnosing circuit, comprising:
- a test block including a first circuit which is an object of a degradation diagnosis;
a reference block including a second circuit which has a configuration identical with a configuration of the first circuit;
a judgment unit that judges whether a component of the test block is degraded or not by comparing a first characteristic of a first signal outputted from the test block, and a second characteristic of a second signal outputted from the reference block, in the case in which a signal indicating a measurement mode is inputted; and
a control unit that outputs the signal which indicates the measurement mode to the judgment unit.
1 Assignment
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Accused Products
Abstract
In order to measure a state of degradation of a semiconductor integrated circuit more correctly by use of a simple configuration, a degradation diagnosing circuit includes: a test block including a first circuit which is an object of a degradation diagnosis; a reference block including a second circuit which has a configuration identical with a configuration of the first circuit; a judgment unit that judges whether a component of the test block is degraded or not by comparing a characteristic of a first signal outputted from the test block, and a characteristic of a second signal outputted from the reference block, in the case in which a signal indicating a measurement mode is inputted; and a control unit that outputs the signal which indicates the measurement mode to the judgment unit.
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Citations
12 Claims
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1. A degradation diagnosing circuit, comprising:
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a test block including a first circuit which is an object of a degradation diagnosis; a reference block including a second circuit which has a configuration identical with a configuration of the first circuit; a judgment unit that judges whether a component of the test block is degraded or not by comparing a first characteristic of a first signal outputted from the test block, and a second characteristic of a second signal outputted from the reference block, in the case in which a signal indicating a measurement mode is inputted; and a control unit that outputs the signal which indicates the measurement mode to the judgment unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. A degradation diagnosing method, comprising
judging whether a component of a test block which includes a first circuit which is an object of a degradation diagnosis is degraded or not by comparing first characteristic of a first signal outputted from the test block, and second characteristic of a second signal outputted from a reference block including a second circuit which has a configuration identical with a configuration of the first circuit, in the case in which a signal indicating a measurement mode is inputted.
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12. A degradation diagnosing circuit, comprising:
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a test block including a first circuit which is an object of a degradation diagnosis; a reference block including a second circuit which has a configuration identical with a configuration of the first circuit; a judgment means for judging whether a component of the test block is degraded or not by comparing first characteristic of a first signal outputted from the test block, and second characteristic of a second signal outputted from the reference block, in the case in which a signal indicating a measurement mode is inputted; and a control means for outputting the signal which indicates the measurement mode to the judgment means.
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Specification