Wide-range voltage stabilizing circuit for band-gap reference

Abstract

The invention provides a wide-range voltage stabilizing circuit for band-gap reference. The circuit comprises a band-gap reference module, a bias voltage generating module and a current negative feedback module; the bias voltage generating module is connected with the band-gap reference module for outputting bias voltage to the band-gap reference module; the bias voltage generating module comprises a first Wilson current mirror circuit and a second Wilson current mirror circuit, and the second Wilson current mirror circuit is embedded into the first Wilson current mirror circuit; the current negative feedback module is connected with the bias voltage generating module and the band-gap reference module separately and used for configuring the bias voltage generating module and supplying power to the band-gap reference module. The bias voltage with the high power supply rejection ratio and power supply can be supplied to band-gap reference, and the band-gap reference can work normally under the wide-range chip power condition.

Description

technical field [0001] The present disclosure relates to the field of electronic technology, in particular to a wide-range voltage stabilizing circuit for a bandgap reference. Background technique [0002] Bandgap reference is a very important part of CMOS integrated circuits, it provides accurate current bias for the whole circuit, so its performance is directly related to the performance of the whole chip. [0003] The goal of a bandgap reference is to achieve a reference voltage that is invariant to temperature and supply voltage. The internal bias circuit of the traditional bandgap reference adopts a simple self-bias structure, and the internal power supply also uses the system power supply, which will cause the power supply rejection ratio performance of the bandgap reference to be average, and it is difficult to meet the requirements of a high-performance bandgap reference . [0004] Therefore, how to design a bandgap reference that realizes a high power supply rejec...

AI Technical Summary

Problems solved by technology

The internal bias circuit of the traditional bandgap reference adopts a simple self-bias structure, and the internal power supply also uses the system power supply, which will cause the power supply rejection ratio performance of the bandgap reference to be average, and it is difficult to meet the requirements of a high-performance bandgap reference

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