Back to results
US 12,608,508 B2Granted
Fault-injection protection circuit for protecting against laser fault injection
AssigneeeMemory Technology Inc.
InventorDung Le Tan Hoang
Life of this patent
Estimating the term…
Abstract
A fault-injection protection circuit includes a circuit under protection and a detection circuit. The detection circuit includes a detection cell having unequal pull-up capability and pull-down capability, and is arranged at a distance less than a laser spot diameter from the circuit under protection. The detection circuit is used to generate an alarm signal upon detecting a laser fault injection.
Claims17
A fault-injection protection circuit comprising:
- a circuit under protection;
- and
- a first detection circuit configured to generate an alarm signal upon detecting a laser fault injection, and comprising:
- a first detection cell having unequal first pull-up capability and first pull-down capability, arranged at a distance less than a laser spot diameter from the circuit under protection, and comprising:
- an input terminal configured to receive a supply voltage or a ground voltage, and
- an output terminal;
- a second detection cell having unequal second pull-up capability and second pull-down capability, arranged at a distance less than the laser spot diameter from the circuit under protection, and comprising:
- an input terminal coupled to the output terminal of the first detection cell, and
- an output terminal.
6 more elements
A fault-injection protection circuit comprising:
- a circuit under protection comprising a latch, the latch comprising:
- a first inverter comprising an input terminal and an output terminal;
- and
- a second inverter comprising an input terminal coupled to the output terminal of the first inverter, and an output terminal coupled to the input terminal of the first inverter;
- a first detection circuit configured to generate an alarm signal upon detecting a laser fault injection, arranged at the distance less than a laser spot diameter from the first inverter, configured to disable the second inverter upon detecting the laser fault injection, and comprising:
- a first detection cell having unequal first pull-up capability and first pull-down capability, arranged at a distance less than the laser spot diameter from the circuit under protection;
- and
- a second detection circuit comprising:
- a second detection cell having unequal second pull-up capability and second pull-down capability, arranged at a distance less than the laser spot diameter from the second inverter, and configured to disable the first inverter upon detecting another laser fault injection.
6 more elements
A fault-injection protection circuit comprising:
- a circuit under protection comprising a sense amplifier;
- a first detection circuit configured to generate an alarm signal upon detecting a laser fault injection, and comprising:
- a first detection cell having unequal first pull-up capability and first pull-down capability, arranged at a distance less than a laser spot diameter from the circuit under protection, and comprising an input terminal configured to receive a supply voltage, and an output terminal;
- and
- a second detection cell having unequal second pull-up capability and second pull-down capability, arranged at a distance less than the laser spot diameter from the circuit under protection, and comprising an input terminal coupled to the output terminal of the first detection cell, and an output terminal;
- a second detection circuit comprising:
- a third detection cell having unequal third pull-up capability and third pull-down capability, arranged at a distance less than the laser spot diameter from the circuit under protection, and comprises an input terminal configured to receive a ground voltage, and an output terminal;
- and
- a fourth detection cell having unequal fourth pull-up capability and fourth pull-down capability, arranged at a distance less than the laser spot diameter from the circuit under protection, and comprises an input terminal coupled to the output terminal of the third detection cell, and an output terminal;
- a first inverter comprising an input terminal coupled to the output terminal of the second detection cell, and an output terminal;
- and
- an OR gate comprising a first input terminal coupled to the output terminal of the first inverter, a second input terminal coupled to the output terminal of the fourth detection cell, and an output terminal coupled to a control terminal of the sense amplifier.
9 more elements
Dependencies are inferred from the claim text.