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US 8,508,284 B2Granted
Semiconductor integrated circuit having fuse circuit and driving method of fuse circuit
AssigneeHynix Semiconductor Inc.
InventorYoung-Han Jeong
Life of this patent
Estimating the term…
Abstract
A semiconductor integrated circuit includes a fuse connected between a first node and a second node, a first driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal, a second driver configured to pull up a voltage of the second node in an initial period of a fuse sensing period in response to the fuse sensing signal, a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node, and a third driver configured to drive the second node to a voltage level lower than a pull-up voltage level of the second driver after the initial period of the fuse sensing period in response to an output signal of the sensor and the fuse sensing signal.
Claims20
A semiconductor integrated circuit, comprising:
- a fuse connected between a first node and a second node;
- a first driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal;
- a second driver configured to pull up a voltage of the second node in an initial period of a fuse sensing period in response to the fuse sensing signal;
- a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node;
- and
- a third driver configured to drive the second node to a voltage level lower than a pull-up voltage level of the second driver after the initial period of the fuse sensing period in response to an output signal of the sensor and the fuse sensing signal.
3 more elements
A semiconductor integrated circuit, comprising:
- a fuse connected between a first node and a second node;
- a first driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal;
- a second driver configured to pull up a voltage of the second node in an initial period of a fuse sensing period in response to the fuse sensing signal;
- a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node;
- and
- a third driver configured to drive the second node toward a ground voltage after the initial period of the fuse sensing period in response to an output signal of the sensor and the fuse sensing signal.
3 more elements
A semiconductor integrated circuit, comprising:
- a fuse connected between a first node and a second node;
- an initialization driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal;
- a pulse generator configured to receive the fuse sensing signal and generate a fuse sensing pulse that is enabled for an initial period of a fuse sensing period;
- a pull-up driver configured to pull up a voltage of the second node in response to the fuse sensing pulse;
- a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node;
- a logic operator configured to perform a logic operation on an output signal of the sensor and the fuse sensing signal;
- and
- a ground voltage driver configured to drive the second node toward a ground voltage in response to an output signal of the logic operator.
5 more elements
A method for driving a fuse circuit including a fuse connected between a first node and a second node, comprising:
- pulling down a voltage of the first node in an initialization period;
- pulling up a voltage the second node in an initial period of a fuse sensing period;
- determining whether the fuse is blown or not in response to a voltage of the first node in the fuse sensing period to produce a sensing result;
- and
- driving the second node toward a voltage level lower than a pull-up voltage level of the second node in response to the sensing result after the initial period of the fuse sensing period.
2 more elements
A semiconductor integrated circuit, comprising:
- a fuse connected between a first node and a second node;
- a first driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal;
- a second driver configured to pull up a voltage of the second node in an initial first period of a fuse sensing period in response to the fuse sensing signal;
- a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node;
- a delayed fuse sensing signal generator configured to generate a delayed fuse sensing signal by delaying an enabling edge of the fuse sensing signal up to an initial second period of the fuse sensing period that includes the initial first period;
- and
- a third driver configured to drive the second node to a voltage level lower than a pull-up voltage level of the second driver in response to the delayed fuse sensing signal.
4 more elements
A semiconductor integrated circuit, comprising:
- a fuse connected between a first node and a second node;
- an initialization driver configured to pull down a voltage of the first node in an initialization period in response to a fuse sensing signal;
- a pulse generator configured to receive the fuse sensing signal and generate a fuse sensing pulse that is enabled for an initial first period of a fuse sensing period;
- a pull-up driver configured to pull up a voltage of the second node in response to the fuse sensing pulse;
- a sensor configured to determine whether the fuse is blown or not in response to a voltage of the first node;
- a delayed fuse sensing signal generator configured to generate a delayed fuse sensing signal by delaying an enabling edge of the fuse sensing signal up to an initial second period of the fuse sensing period that includes the initial first period;
- a voltage divider configured to divide a pull-up voltage of the pull-up driver and output a divided voltage;
- and
- a divided voltage driver configured to drive the second node toward the divided voltage level in response to the delayed fuse sensing signal.
6 more elements
A method for driving a fuse circuit which includes a fuse connected between a first node and a second node, comprising:
- pulling down a voltage of the first node in an initialization period;
- pulling up a voltage of the second node during an initial first period of a fuse sensing period;
- determining whether the fuse is blown or not in response to a voltage of the first node in the fuse sensing period;
- driving the second node toward a voltage level lower than a pull-up voltage level of the second node after an initial second period of the fuse sensing period that includes the initial first period.
1 more element
Dependencies are inferred from the claim text.