Surge detection circuit
AssigneeFujitsu Limited
InventorsToshiro Motoyoshi, Kazunori Nishizono
Life of this patent
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Abstract
A surge detection circuit for determining that the characteristics of an internal circuitry of a chip have deteriorated by surges applied from a sensor to the chip and generating a warning signal. The surge detection circuit is connected to an input terminal and includes a surge detector for detecting surge applied to the input terminal and generating an output signal showing the detection result. A determination unit determines that the characteristics of the input circuit have deteriorated based on the output signal of the surge detector and generates a warning signal based on the determination result.
Claims14
A surge detection circuit connected to an input terminal, wherein the input terminal is further connected to an input circuit, the surge detection circuit comprising:
- a surge detector, connected to the input terminal, for detecting surge applied to the input terminal and generating an output signal showing the detection result;
- and
- a determination unit, connected to the surge detector, for determining whether a characteristic of the input circuit has deteriorated based on the output signal of the surge detector and generating a warning signal based on the determination result.
A surge detection circuit connected to an input terminal, wherein the input terminal is further connected to a first input circuit, the surge detection circuit comprising:
- a second input circuit connected to the input terminal;
- a level difference detection circuit, connected to the first input circuit and the second input circuit, for detecting a level difference between an output signal of the first input circuit and an output signal of the second input circuit and generating an output signal showing the detection result;
- and
- a controller, connected to the level difference detection circuit, for generating a warning signal based on the output signal of the level difference detection circuit.
Dependencies are inferred from the claim text.