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Reference voltage circuit with compensation loop and power supply module

A reference voltage and compensation circuit technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as large temperature coefficient and low power supply rejection ratio, and achieve lower temperature coefficient, high power supply rejection ratio, and resolution accuracy poor effect

Active Publication Date: 2017-07-18
东莞市乐丰电器科技有限公司
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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 low power supply rejection ratio and large temperature coefficient of the existing reference voltage generating circuit, and provide a reference voltage circuit and power supply module with higher precision, high power supply rejection ratio and low temperature coefficient

Method used

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  • Reference voltage circuit with compensation loop and power supply module
  • Reference voltage circuit with compensation loop and power supply module
  • Reference voltage circuit with compensation loop and power supply module

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Embodiment Construction

[0011] The present invention provides a reference voltage circuit and a power module with a compensation loop. 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.

[0012] As shown in Figure 1, a reference voltage circuit with a compensation loop includes a start-up circuit and a reference voltage generation circuit; the start-up circuit includes: a twelfth MOS transistor M12, a thirteenth MOS transistor M13, a fourteenth MOS transistor Tube M14, the fifteenth MOS tube M15, the sixteenth MOS tube M16, the second capacitor C2, and the seventeenth MOS tube M17; wherein, the source connection voltage V of the seventeenth MOS tube M17 and the twelfth MOS ...

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Abstract

The invention relates to the technical field of analog circuits, in particular to a reference voltage circuit with a compensation loop and a power supply module. The reference voltage circuit with the compensation loop comprises a starting circuit and a reference voltage generation circuit. On a basis of the traditional reference voltage circuit, the compensation loop is added, so that a temperature coefficient of output voltage is reduced, and the reference voltage circuit has a higher power supply rejection ratio. The invention further provides the power supply module which can be used for converting input alternating current into stable direct current voltage for output.

Description

technical field [0001] The invention relates to the technical field of analog circuits, in particular to a reference voltage circuit with a compensation loop and a power supply module. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 何金昌加文威廉姆斯
Owner 东莞市乐丰电器科技有限公司