Chip high-precision resistor self-calibration circuit

Abstract

The invention relates to a chip high-precision resistance self-calibration circuit, a self-calibration generation circuit of on-chip high-precision resistance in an integrated circuit chip, and relates to the technical field of chip design, especially the design technology of a high-performance analog chip, which adopts an on-chip self-calibration method, In the case that off-chip high-precision resistors are not required, the self-calibration of the on-chip resistance is realized by charging and discharging, and the deviation of the on-chip resistance is reduced from + / -20% to within + / -5%. This calibration method requires on-chip high-precision capacitors to cooperate together. The technology below 65nm process node is used to realize on-chip high-precision resistors. The accuracy error is reduced from the original + / -20% to + / -5%, so that each on-chip The design deviation of this kind of high-precision sensitive circuit is reduced, and the mass production rate of the chip is greatly improved. At the same time, this calibration method does not need to use an off-chip high-precision resistor as a reference, which can save the cost of an off-chip reference resistor and the time for field calibration, thereby saving the cost of mass production and application of the chip.

Description

technical field [0001] The invention relates to a chip high-precision resistance self-calibration circuit, an on-chip high-precision resistance self-calibration generation circuit in an integrated circuit chip, and relates to the technical field of chip design, in particular to the design technology of a high-performance analog chip. Background technique [0002] The on-chip resistance of traditional integrated circuits (chips) has a large process error, up to + / -20%. This will lead to a large deviation of the chip circuit, resulting in a large deviation of the bias state of each circuit, especially a relatively large impact on sensitive circuits. Such a large current deviation increases the difficulty of chip design. In order to reduce the current deviation of the chip, the general high-performance chip design will purchase an off-chip high-precision resistor to generate a precise current (+ / -5%), thereby improving the mass production rate of the chip. Doing so increases ...

AI Technical Summary

Problems solved by technology

This will lead to a large deviation of the chip circuit, resulting in a large deviation of the bias state of each circuit, especially for sensitive circuits.

Such a large current deviation increases the difficulty of chip design

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