High-order temperature compensation reference source

Abstract

The invention relates to the technical field of analogue integrated circuits, in particular to a high-order temperature compensation reference source. The high-order temperature compensation reference source comprises a positive temperature coefficient current module, a negative temperature coefficient current module and a reference voltage generation module, wherein the input ends of the positive temperature coefficient current module and the negative temperature coefficient current module are connected with a power source VIN, the output end of the positive temperature coefficient current module is connected with a first input end of the reference voltage generation module, the output end of the negative temperature coefficient current module is connected with a second input end of the reference voltage generation module, and the output end of the reference voltage generation module outputs reference voltage. The high-order temperature compensation reference source has the advantages that the output reference source has higher accuracy compared with a traditional band-gap reference source; compared with a traditional high-order compensation band-gap reference source, the circuit structure of the high-accuracy reference source is simpler and is less affected by the process, and the high-order temperature compensation reference source is particularly suitable for a band-gap reference circuit.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuits, and in particular relates to a high-order temperature compensation reference source based on mobility temperature characteristics. Background technique [0002] In the field of analog integrated circuit or mixed-signal integrated circuit design, the reference voltage source is a very important and commonly used module. It is often used in circuit systems such as ADC converters, DCDC converters, and power amplifiers. Its role is to provide a system for the system. Voltage references that are invariant to temperature and supply voltage. [0003] In precision measurement instruments and widely used digital communication systems, reference voltage sources are often used as the basis for system measurement and calibration. Therefore, the reference voltage source occupies a very important position in the analog integrated circuit, which directly affects the performance and precision...

AI Technical Summary

Problems solved by technology

However, realizing a high-precision bandgap reference source through these two methods usually requires a more complex circuit structure, which will result in a larger layout area, and the accuracy of the output reference source is easily affected by process drift.

Images