High-order temperature compensation reference source

A reference source and reference voltage technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of large layout area, output reference source accuracy easily affected by process drift, complex circuit structure, etc. The effect of small size, high precision and simple circuit structure

CN104156025AInactive Publication Date: 2014-11-19UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-11-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

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Embodiment Construction

[0014] The specific embodiment of the present invention is described below in conjunction with accompanying drawing

[0015] This paper proposes a high-order temperature-compensated reference source based on mobility temperature characteristics. The specific circuit architecture is as follows figure 1 As shown, it includes a positive temperature coefficient current source module, a negative temperature coefficient current source module, and a reference voltage generation module that are related to the temperature to the power of n (n>1); wherein, the first bias generated by the positive temperature coefficient current source module The voltage VB1 is connected to one input terminal of the reference voltage generation module; the second bias voltage VB2 generated by the negative temperature coefficient current source module is connected to the other input terminal of the reference voltage generation module; the output terminal of the reference voltage generation module outputs t...