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A high-speed power-on anti-overshoot circuit for bandgap reference voltage

A reference voltage, anti-overshoot technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the risk of loop stability, it is difficult to completely eliminate the problems of overshoot voltage, excessive power consumption, etc. High magnification, stable voltage output and low dynamic power consumption

Active Publication Date: 2020-08-14
XTX TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will bring additional problems, excessive power consumption and loop stability risk, and it is difficult to completely eliminate the overshoot voltage

Method used

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  • A high-speed power-on anti-overshoot circuit for bandgap reference voltage
  • A high-speed power-on anti-overshoot circuit for bandgap reference voltage
  • A high-speed power-on anti-overshoot circuit for bandgap reference voltage

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Embodiment 1

[0029] An embodiment of the present invention provides a bandgap reference voltage high-speed power-on anti-overshoot circuit, which is suitable for outputting a bandgap reference voltage without overshoot, see figure 1 , the bandgap reference voltage high-speed power-on anti-overshoot circuit may include:

[0030] The main circuit 10 is connected to the power supply VCC, and is used to output the bandgap reference voltage according to the power supply voltage provided by the power supply VCC.

[0031] The starting module 20 is connected with the main circuit 10 and used for starting the main circuit 10 .

[0032] The output module 30 is connected with the main circuit 10 and configured to output a bandgap reference voltage of a required specification according to the bandgap reference voltage provided by the main circuit 10 .

[0033] The delay control module 40 is connected with the main circuit 10 and the output module 30 respectively, and is used to collect the overshoot ...

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Abstract

The invention discloses a band-gap reference voltage high-speed powered anti-overshoot circuit comprising a main circuit, a startup module, an output module and a filter delay control module. The band-gap reference voltage high-speed powered anti-overshoot circuit provided by the invention filters out the overshoot current generated at the startup stage through the filter delay control module, converts the overshoot current into a voltage signal after the delay, detects the voltage signal by using a single-stage amplifier, and finally controls the output module to weaken or eliminate the overshoot of the output voltage and make the output voltage stable. In addition, the single-stage amplifier is used as the threshold detection circuit in the filter delay control module, and compared withthe inverter, the single-stage amplifier has the advantages such as high magnification factor, high detection accuracy and low dynamic power consumption. Moreover, since the eleventh switch tube is connected by a current source and its gate voltage is constant, the influence of the change of the threshold voltage caused by the process deviation on its detection accuracy can be ignored.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a bandgap reference voltage high-speed power-on anti-overshoot circuit. Background technique [0002] A bandgap voltage reference circuit is a very important part of any electronic system, providing an accurate and stable reference voltage to other circuits within the electronic system. Therefore, the accuracy, speed and stability of the bandgap reference voltage circuit are particularly important. However, when powering on at high speed, due to the limitation of the feedback loop establishment time of the bandgap reference voltage circuit, the output voltage will have a large overshoot. There is a risk of breakdown. In the traditional solution, the settling time of the system loop is accelerated by increasing the current, thereby improving the output voltage overshoot phenomenon during fast startup. However, this will bring additional problems, excessive power con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/571
CPCG05F1/571
Inventor 王述前龙冬庆
Owner XTX TECH INC
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