Fuse programming circuit for programming fuses
First Claim
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1. A fuse programming circuit comprising:
- a fuse having first and second ends and programmed in accordance with a current supplied, the first end being connected to a first power supply;
a thyristor having first and second electrodes and a gate electrode, the first electrode being connected to the second end of the fuse and the second electrode being connected to a second power supply lower in potential than the first power supply; and
a control circuit having an input terminal supplied with an input signal and an output terminal connected to the gate electrode of the thyristor, the control circuit generating a control signal in accordance with the input signal which is supplied to the gate electrode of the thyristor to turn the thyristor ON.
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Abstract
A fuse is programmed by being supplied with a current. The fuse is connected to a thyristor. A control circuit is connected to the gate of the thyristor. The control circuit turns the thyristor ON to allow the fuse to be programmed.
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Citations
26 Claims
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1. A fuse programming circuit comprising:
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a fuse having first and second ends and programmed in accordance with a current supplied, the first end being connected to a first power supply;
a thyristor having first and second electrodes and a gate electrode, the first electrode being connected to the second end of the fuse and the second electrode being connected to a second power supply lower in potential than the first power supply; and
a control circuit having an input terminal supplied with an input signal and an output terminal connected to the gate electrode of the thyristor, the control circuit generating a control signal in accordance with the input signal which is supplied to the gate electrode of the thyristor to turn the thyristor ON. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fuse programming circuit comprising:
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a plurality of fuses having first and second ends and programmed in accordance with a current supplied, the first end of each of the fuses being connected to a first power supply;
a plurality of thyristors having first and second electrodes and first and second gate electrodes, the first electrode of the respective thyristor being connected to the second end of the corresponding fuse and the respective second electrode being connected to a second power lower in potential than the first power supply; and
a control circuit having an input terminal supplied with an input signal and a plurality of output terminals connected to the first and second gate electrodes of the respective thyristors, the control circuit generating a control signal for selecting one of the thyristors in accordance with the input signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A fuse programming circuit comprising:
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a plurality of antifuses having first and second ends and programmed by short-circuiting their current paths, the first end of the respective antifuse being connected to a first power supply;
a plurality of thyristors, each, connected to the second end of the corresponding antifuse, the respective thyristor supplying a voltage to the antifuse to allow the antifuse to be programmed; and
a decoder for selecting one of these thyristors in accordance with an address signal and turning that thyristor ON. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A phase programming circuit comprising:
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a fuse programmed by being supplied with a current;
a thyristor having a current path and gate electrode, one end of the current path of the thyristor being connected to the fuse; and
a control circuit connected to the gate electrode of the thyristor, the control circuit turning the thyristor ON to allow the fuse to be programmed.
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Specification