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US 10,310,525 B2Granted
Electronic device that measures a standby current of a circuit after burn-in
AssigneeHitachi Automotive Systems, Ltd.
InventorsMasahiro Matsumoto, Hiroshi Nakano, Yoshimitsu Yanagawa, Akira Kotabe
Life of this patent
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Abstract
Provided is an electronic device which can easily measure a standby current of an internal circuit of an electronic device after burn-in. The electronic device includes: a power source terminal; a regulator that generates a predetermined voltage from a voltage of the power source terminal; an internal circuit that is operated by an output voltage of the regulator; and a standby terminal through which the regulator and the internal circuit are set to a low power consumption state.
Claims20
An electronic device comprising:
- a power source terminal;
- a regulator that generates a predetermined voltage from a voltage of the power source terminal;
- an internal circuit that is operated by an output voltage of the regulator;
- a standby terminal through which the regulator and the internal circuit are set to a low power consumption state;
- and
- a burn-in terminal that shifts the output voltage of the regulator to a state that changes according to the voltage of the power supply, wherein
- when predetermined voltage is applied to the burn-in terminal, the output voltage of the regulator which is lower than the voltage of the power supply terminal is applied to the internal circuit,
- when a predetermined voltage is applied to the standby terminal, the regulator and the internal circuit are brought into a low power consumption state so that the current of the power supply terminal and the current of the output terminal of the regulator are made equal, and
- when a predetermined voltage is applied to both the burn-in terminal and the standby terminal, the standby current of the internal circuit can be detected only by measuring the current of the power supply terminal.
6 more elements
An electronic device comprising:
- a power source terminal;
- a regulator that generates a predetermined voltage from a voltage of the power source terminal;
- an internal circuit that is operated by an output voltage of the regulator;
- a standby terminal through which the regulator and the internal circuit are set to a low power consumption state;
- and
- a burn-in terminal through which it is caused a state where the output voltage of the regulator is changed according to the voltage of the power source terminal, wherein
- the burn-in terminal and the standby terminal are configured from the same terminal, and
- the electronic device includes a three-level logic circuit that causes a state where the output voltage of the regulator is changed according to the voltage of the power source terminal, and causes the regulator and the internal circuit move to the low power consumption state according to a voltage level applied to the same terminal.
5 more elements
Dependencies are inferred from the claim text.