| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an anti-fuse element and a circuit for realizing functions of writing data to the anti-fuse element and detecting the data using a fewer components than that in prior arts. <P>SOLUTION: When a logical value 1 is written to a nonvolatile latch circuit, a control signal CTL 1 is brought to a low level, a programming control signal PGMA is brought to a high level, and a programming control signal PGMB is brought to a low level, while a control signal CTL2 is set to a high level. A second power supply VDD 2 outputs a programming voltage Vpp to a node Nvs, an output terminal RCB goes to a level Vpp, and the insulation of a transistor 5 with a thin-gate insulation film is destroyed. The signal PGMA is set to a low level, the signal PGMB is set to a high level, and the signals CTL1, CTL2 are set to a low level in the normal operating mode. A normal operating voltage Vop is outputted from a first power supply VDD1 to the node Nvs, an output terminal RC goes to a high level, because the insulation of the transistor 5 is destroyed and the logical value 1 is stored in a non-volatile way. <P>COPYRIGHT: (C)2004,JPO |
