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Low-power-consumption temperature compensation current source circuit

A technology of temperature compensation and low power consumption, applied in the field of radio frequency analog identification, can solve the problems that electronic tags cannot meet the requirements, high power consumption temperature compensation, etc.

Inactive Publication Date: 2018-10-16
华大恒芯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the triode and the op amp require large power consumption to achieve good temperature compensation, which cannot meet the requirements for passive electronic tags

Method used

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  • Low-power-consumption temperature compensation current source circuit
  • Low-power-consumption temperature compensation current source circuit
  • Low-power-consumption temperature compensation current source circuit

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Embodiment Construction

[0023] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0024] The passive radio frequency electronic tag has no power source itself, and the energy required for work comes from the space coupling of the electromagnetic field. The radio frequency circuit converts the AC energy in the space into the DC power required by the chip through structural design such as rectification and limiting, so as to activate the internal circuit of the chip and complete the label. Communication with the card machine. The tag performs command demodulation and data transmission through the change of radio frequency pulse, and completes data storage, transmission or other operations by receiving instructions through the cooperation of analog modules and digital modules. The way the tag returns data is by controlling the i...

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Abstract

The invention discloses a circuit for a low power temperature compensation current source for an electronic tag is characterized in that comprises a transistor unit for generating a positive temperature current and a temperature control unit for generating a negative temperature compensation, the temperature control unit including at least one diode D1, the current input diode D1 generates a voltage value that varies with temperature. The negative temperature coefficient voltage generated by the diode of the circuit controls the resistance of positive temperature coefficient formed by MOS tubegrid electrode, and realizes the current of the negative temperature characteristic, and complements the original positive temperature coefficient current to obtain the current of the zero temperature coefficient good temperature characteristics of the current source can be achieved under very low power consumption conditions.

Description

technical field [0001] The invention belongs to the technical field of radio frequency analog identification, and relates to a low power consumption temperature compensation technology of an electronic tag. Background technique [0002] With the popularity of the Internet of Things, electronic tags have been widely used, and the demand for tags with high performance and low power consumption has become increasingly prominent. Traditional design ideas can no longer meet application requirements. Among them, the temperature characteristics of the current source of the electronic tag under low power consumption has become an urgent problem to be solved. [0003] The performance of the label directly determines the size of its application range, especially the performance of the label at different temperatures is particularly important. How to control the label to have good performance at different temperatures has become a major problem in current design. Due to the limitati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 温立国
Owner 华大恒芯科技有限公司
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