Band-gap reference voltage-stabilizing source and system for improving load response property of band-gap reference voltage-stabilizing source

Abstract

The invention discloses a band-gap reference voltage-stabilizing source and a system for improving the load response property of the band-gap reference voltage-stabilizing source. The system is applied to a band-gap reference voltage-stabilizing source and comprises a low pass filter, wherein an input end of the low pass filter is connected with an output end of an error amplifier in the band-gapreference voltage-stabilizing source and a base electrode of a second triode respectively, and an output end of the low pass filter is connected with a base electrode of a first triode in the band-gapreference voltage-stabilizing source. According to the system, the low pass filter is capable of impeding high-pulse overshoot and low-pulse overshoot of the base electrode of the first triode, so that a differential signal of the input end of the error amplifier is remarkably negatively increased (corresponding to the high-pulse overshoot) or positively increased (corresponding to the low-pulseovershoot), the high-pulse overshoot and the low-pulse overshoot are correspondingly remarkably inhibited after the differential signal is further amplified by the error amplifier, the working currentof the band-gap reference voltage-stabilizing source is reduced, meanwhile, the load response of the band-gap reference voltage-stabilizing source is improved, the lower power consumption is guaranteed, and meanwhile, the safety and the reliability are guaranteed.

Description

technical field [0001] The invention relates to the technical field of voltage stabilizing sources, in particular to a bandgap reference stabilizing voltage source and a system for improving its load response characteristics. Background technique [0002] Bandgap reference voltage sources are widely used in system design, please refer to figure 1 , figure 1 A structural schematic diagram of a bandgap reference voltage regulator provided by the present invention, the bandgap reference voltage regulator includes a bandgap source core device and an amplifier, the bandgap source core device includes a first triode, a second triode , the first resistance, the second resistance and the triode load, the first output end of the triode load is respectively connected with the collector of the first triode and the inverting input end of the error amplifier, and the second output end of the triode load is respectively connected with the second The collector of the triode is connected ...

AI Technical Summary

Problems solved by technology

And as the quiescent operating current decreases, the output overshoot becomes larger and larger, and the overshoot to a certain extent will cause abnormal or wrong operation of other circuits in the system, which is unacceptable

In the existing design, considering the safety and reliability of the system, when making a compromise between the load response characteristics and the system power consumption, the circuit design usually adopts a larger quiescent operating current, that is, the selection guarantee Safety and reliability, but this will inevitably lead to increased power consumption of the system

Images