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Voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio

A technology with high power supply rejection ratio and voltage reference source, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of difficult to reduce power consumption, high output voltage, etc. The effect of ultra-low power consumption

Active Publication Date: 2016-06-15
SYSU CMU SHUNDE INT JOINT RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high output voltage (1.2V) and difficult to reduce power consumption of this traditional bandgap reference circuit, as well as the large circuit area (use of resistors) limit its further development and application to a certain extent

Method used

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  • Voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio
  • Voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio
  • Voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio

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Effect test

Embodiment 1

[0033] Such as figure 2 As shown, a voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio includes a starting circuit unit, a current generating circuit unit and an output voltage reference circuit unit electrically connected in sequence;

[0034] The start-up circuit unit is used to provide a start-up voltage to prevent the voltage reference source circuit from working in a zero-state region;

[0035] The current generating circuit unit is used to generate a working current for the output voltage reference circuit unit, while reducing the power consumption of the voltage reference source circuit;

[0036] The output voltage reference circuit unit is used to realize voltage reference output with zero temperature coefficient and high power supply rejection ratio.

[0037] The threshold voltage of CMOS changes with temperature and has a negative temperature coefficient, and its expression is

[0038] V TH =V TH (T 0 )-κ(T-T...

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PUM

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Abstract

The invention provides a voltage reference source circuit with ultra-low power consumption and a high power supply rejection ratio.The voltage reference source circuit comprises a starting circuit unit, a current generation circuit unit and an output voltage reference circuit unit which are electrically connected in sequence.The staring circuit unit is used for providing starting voltage and preventing the voltage reference source circuit from working in a zero-state zone.The current generation circuit unit is used for generating working current for the output voltage reference circuit unit and lowering the power consumption of the voltage reference source circuit at the same time.The output voltage reference circuit unit is used for achieving voltage reference output at a zero temperature coefficient and a high power supply rejection ratio.The voltage reference source circuit has the advantages of being ultra-low in power consumption, low in temperature coefficient, high in power supply rejection ratio, wide in working voltage range and small in size.

Description

technical field [0001] The invention relates to the field of voltage reference source circuits, in particular to a voltage reference source circuit with ultra-low power consumption and high power supply rejection ratio. Background technique [0002] The reference source circuit has the outstanding advantage of being almost independent of power supply voltage, process, and temperature changes, so it is widely used in high-precision comparators, A / D or D / A converters, LDO voltage regulators, and many other analog integrated circuits Among them, the accuracy and stability of the reference voltage it provides determines the final performance of the entire system. [0003] The following performance indicators are mainly considered in the design of the reference source circuit: temperature coefficient, operating voltage range, power supply rejection ratio and power consumption. The lower the temperature coefficient is, the less the output voltage of the reference source circuit i...

Claims

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Application Information

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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 谭洪舟李毓鳌曾衍瀚王阳唐诗豪张鑫
Owner SYSU CMU SHUNDE INT JOINT RES INST
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