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Low-power-consumption bandgap reference source and power supply unit

A reference source, low power consumption technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of high temperature coefficient and high power consumption of the bandgap reference source, achieve low power consumption, solve poor precision, The effect of reducing the temperature coefficient

Active Publication Date: 2017-07-11
HUI CHENG ELECTRONICS S&T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high temperature coefficient and high power consumption of the bandgap reference source in the prior art, and provide a higher precision low power consumption bandgap reference source and power supply device

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  • Low-power-consumption bandgap reference source and power supply unit
  • Low-power-consumption bandgap reference source and power supply unit
  • Low-power-consumption bandgap reference source and power supply unit

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Embodiment Construction

[0010] The present invention provides a low-power consumption bandgap reference source and a power supply device. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0011] As shown in Figure 1, a low-power bandgap reference source includes an input voltage regulator circuit and a reference source generation circuit; the input voltage regulator circuit includes a first operational amplifier OP1, and the first operational amplifier OP1 is connected to the positive input terminal The input voltage VIN, the output end of the first operational amplifier OP1 is connected to the gate of the first PMOS transistor P1 and one end of the first capacitor C1, t...

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Abstract

The invention relates to the technical field of analog circuits and particularly relates to a low-power-consumption bandgap reference source and a power supply unit. The low-power-consumption bandgap reference source provided by the invention comprises an input voltage stabilizing circuit and a reference source generating circuit. The invention further provides the power supply unit. According to the low-power-consumption bandgap reference source and the power supply unit, on the basis of the traditional bandgap reference voltage circuit, through additionally arranging a temperature compensation subcircuit, the temperature coefficient of output voltage is reduced, and the power consumption is relatively low.

Description

technical field [0001] The invention relates to the technical field of analog circuits, in particular to a low-power consumption bandgap reference source and a power supply device. Background technique [0002] The reference voltage generation circuit is the basic module unit in analog circuit design, mixed signal circuit design and digital design. Its function is to provide a reference voltage for the system that does not vary with temperature and supply voltage. In the reference voltage generation circuit, the two parameters of temperature coefficient (TC, Temperature Coefficient) and power supply rejection ratio (PSRR, Power Supply Rejection Ratio) play a decisive role in the performance of the power supply, high precision, low power consumption, high The reference voltage generation circuit with power supply rejection ratio and low temperature coefficient is very important for the whole circuit. A traditional bandgap reference voltage can obtain a reference voltage with...

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Application Information

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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 何金昌加文威廉姆斯
Owner HUI CHENG ELECTRONICS S&T