Band gap reference circuit with resistance compensation
A technology of reference circuit and resistance compensation, which is applied in the field of bandgap reference circuit and bandgap reference circuit with resistance compensation, which can solve the problems of not being able to meet the small integration of the circuit, the performance of the bandgap reference circuit is greatly affected, and the circuit system is affected.
Pending Publication Date: 2018-07-31
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology
The traditional bandgap reference generation circuit usually includes a start-up circuit, a current generation circuit, a current mirror circuit and a reference voltage generation circuit. However, the traditional resistance compensation method has relatively high requirements for the resistance process, and different resistance processes have a great impact on the performance of the bandgap reference circuit. The impact is very large, which directly affects the entire circuit system
In addition, the traditional resistance compensation method seriously restricts the portability of the bandgap reference circuit
Moreover, the area is very large, which brings great economic costs, and cannot meet the small integration of circuits.
Method used
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[0114] The specific examples that follow represent exemplary embodiments of the invention and are illustrative rather than limiting in nature. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details are not necessary to the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.
[0115] In the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the term "in one embodiment" in various places in the specification are not all referring to the same embodiment, nor are they intended to mutually exc...
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The invention relates to a band gap reference circuit with resistance compensation based on a CMOS (Complementary Metal Oxide Semiconductor) technology, belongs to the field of analog integrated circuits, and in particular relates to a band gap reference circuit with resistance compensation. The band gap reference circuit comprises a band gap reference core circuit and a compensation current generation circuit, wherein the compensation current generation circuit comprises a current multiplier circuit, an IPTAT generation circuit, an IPTAT2 generation circuit, an IPTAT4 generation circuit and an Iout generation circuit. According to the band gap reference circuit provided by the invention, through skillful conversion of circuits, the band gap reference circuit is manufactured without adopting a plurality of processes, and compensation is performed by using a similar resistance compensation method in principle, but real resistance is not required for realization, so that the processing cost is greatly reduced compared with other resistance compensation methods adopting a plurality of processes from a process point of view, and the problem of dependence of resistance on process is solved. In addition, the band gap reference circuit provided by the invention adopts a resistance mode for compensation, thus greatly improving temperature coefficient characteristics of a band gap reference.
Description
technical field [0001] The invention relates to a bandgap reference circuit with resistance compensation based on CMOS technology, which belongs to the field of analog integrated circuits, in particular to a bandgap reference circuit with resistance compensation. Background technique [0002] In recent years, the development of integrated circuits in our country has been rapid. As an extremely important module of the circuit system, the bandgap reference circuit is often widely used in analog, digital and digital-analog hybrid systems. The bandgap reference circuit in the circuit system can generate a stable voltage source as a reference voltage, which can be used as a stable reference voltage for other circuit modules. Therefore, in order to meet the development of today's high-performance integrated circuits, the requirements for the power supply voltage are increasingly stringent. For example, the bandgap reference circuit is required to have high output accuracy, high p...
Claims
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Login to View More IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 杨燕赵健雄
Owner CHENGDU UNIV OF INFORMATION TECH