Transistor model capable of describing high temperature and low temperature mismatching characteristics and simulation method

Abstract

The invention discloses a transistor model capable of describing high temperature and low temperature mismatching characteristics and a simulation method. The changing trends, along with temperature, of the transistor mismatching characteristics are analyzed on a plurality of temperature conditions respectively, a threshold voltage parameter and a migration rate parameter are selected, extra temperature correction formulas and extra temperature correction coefficients are added respectively on the basis of original correction formulas in a mismatching macro-model, fitting is conducted on the correction coefficients by the utilization of the mismatching trends, along with high and low temperature changes, of the transistor so as to enable the mismatching model to be capable of well reflecting the electrical characteristic mismatching characteristics, and high-quality reference is provided for a circuit designer.

Description

technical field [0001] The invention relates to the design field of semiconductor digital or analog circuits, in particular to a transistor model that can describe high and low temperature mismatch characteristics. The invention also relates to a simulation method of the transistor model capable of describing high and low temperature mismatch characteristics. Background technique [0002] The device process mismatch error has attracted more and more attention in recent years. The process mismatch random error is mainly divided into two parts: 1. It is mainly caused by the slight difference between the size of the device layout and the size in the actual process. Differences in electrical characteristics between the same devices; 2. Differences in electrical characteristics mainly caused by manufacturing process errors between the same devices. In summary, the main factors that affect the differences between the same devices are: [0003] a. Small differences in gate oxide ...

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Problems solved by technology

[0020] But when the transistors are not operating at room temperature, the mismatch error between two adjacent transistors is not the same as at room temperature

In the existing mismatch macro model, since the correction formula does not include temperature correction, if the transistor operates at high temperature, the common mismatch model cannot reflect the real mismatch characteristics

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