Semiconductor device and offset voltage adjusting method
AssigneeNEC Electronics Corporation
InventorsJun FUKUHARA, Tsuyoshi Mitsuda
Life of this patent
Estimating the term…
Abstract
A semiconductor device includes a fuse section having a plurality of fuse circuits configured to generate switch control signals; and an offset adjusting section configured to adjust an offset voltage of a differential amplifier based on the switch control signals supplied from output nodes of the plurality of fuse circuits. Each of the plurality of fuse circuits includes a fuse connected between a first power supply voltage and a cut node; a current source connected between a second power supply voltage and the output node; and a first transistor connected between the output node and the cut node and having a gate connected to the second power supply voltage.
Claims18
A semiconductor device comprising:
- a fuse section having a plurality of fuse circuits configured to generate switch control signals,
- wherein each of said plurality of fuse circuits comprises:
- a fuse connected between a first power supply voltage and a cut node;
- a current source connected between a second power supply voltage and said output node;
- and
- a first transistor connected between said output node and said cut node and having a gate connected to said second power supply voltage.
A method of adjusting an offset voltage comprising:
- supplying an adjustment data to a fuse section, which comprises a plurality of fuse circuits configured to generate switch control signals;
- wherein each of said plurality of fuse circuits comprises:
- a fuse connected between a first power supply voltage and a cut node;
- a current source connected between a second power supply voltage and said output node;
- and
- a first transistor connected between said output node and said cut node and having a gate connected to said second power supply voltage;
- confirming that an offset voltage of a differential amplifier is adjusted based on the adjustment data, without cutting any fuse of the fuse section;
- and
- cutting the fuses of the fuse section based on the adjusted data when it is confirmed that the offset voltage is adjusted.
Dependencies are inferred from the claim text.