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US 9,793,895 B2Granted
Electronic circuit, latch circuit, and external action detecting circuit
AssigneeFujitsu Limited
InventorsDai Yamamoto, Naoya Torii, Ikuya Morikawa
Life of this patent
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Abstract
An electronic circuit includes: a first logic circuit coupled to a first input line and a first output line; a second logic circuit coupled to a second input line and a second output line; a first line pattern coupled to the first output line and including an input line different from the second input line; and a second line pattern coupled to the second output line and different from the first input line, wherein at least a part of the first output line, the first line pattern, the second output line, or the second line pattern has a folded shape or a circular shape.
Claims13
An electronic circuit comprising:
- a first logic circuit coupled to a first input line and a first output line;
- a second logic circuit coupled to a second input line and a second output line;
- a first line pattern including a third input line which is coupled to the first output line, inputs to the second logic circuit as an input line different from the second input line and includes a first folded part corresponding to at least three folded portions;
- and
- a second line pattern including a forth input line which is coupled to the second output line, inputs to the first logic circuit as an input line different from the first input line and includes a second folded part corresponding to at least three folded portions,
- wherein at least a part of the first output line or the second output line has a folded shape part which is different from the first folded part and the second folded part.
3 more elements
A latch circuit comprising:
- a first logic circuit coupled to a first input line and a first output line;
- a second logic circuit coupled to a second input line and a second output line;
- a first line pattern including a third input line which is coupled to the first output line, inputs to the second logic circuit as an input line different from the second input line and includes a first folded part corresponding to at least three folded portions;
- and
- a second line pattern including a forth input line which is coupled to the second output line, inputs to the first logic circuit as an input line an input line different from the first input line and includes a second folded part corresponding to at least three folded portions,
- wherein at least one of the first output line and the second output line has a folded shape part which is different from the first folded part and the second folded part and extends to a detection target area of an external action, and
- an application of an external action on the detection target area of the external action is notified based on a change in an output of one of the first output line, the first line pattern, the second output line, and the second line pattern.
4 more elements
An external action detecting circuit comprising:
- a latch circuit including an output line;
- and
- an attack detector configured to detect an attack based on a change in an output value when an external action is applied to the output line,
- wherein the output line is disposed in an external action detection area,
- wherein the latch circuit includes:
- a first logic circuit coupled to a first input line and a first output line;
- a second logic circuit coupled to a second input line and a second output line;
- a first line pattern including a third input line which is coupled to the first output line, inputs to the second logic circuit as an input line different from the second input line and includes a first folded part corresponding to at least three folded portions;
- and
- a second line pattern including a forth input line which is coupled to the second output line, inputs to the first logic circuit as an input line an input line different from the first input line and includes a second folded part corresponding to at least three folded portions,
- wherein at least one of the first output line and the second output line has a folded shape part which is different from the first folded part and the second folded part and extends to a detection target area of an external action.
8 more elements
Dependencies are inferred from the claim text.