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Floating-grid threshold-value adjustable rectifying circuit for radio electronic label

An electronic label and rectifier circuit technology, which is applied to electrical components, output power conversion devices, and AC power input into DC power output, etc., can solve the problems of reduced rectification efficiency and shortened maximum working distance of labels.

Inactive Publication Date: 2005-12-21
SHANGHAI QUANRAY ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the threshold of MOS devices is generally high, NMOS is about 0.7v, and PMOS is about 0.9v. If this kind of rectification device is used in a low-power RF electronic tag system, the rectification efficiency will be reduced, thereby shortening the longest working distance of the tag.

Method used

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  • Floating-grid threshold-value adjustable rectifying circuit for radio electronic label
  • Floating-grid threshold-value adjustable rectifying circuit for radio electronic label
  • Floating-grid threshold-value adjustable rectifying circuit for radio electronic label

Examples

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Embodiment Construction

[0018] The present invention is further described below by way of examples.

[0019] By cascading the rectification circuit structure described in the present invention, the DC level of the rectification output can be improved, such as Figure 4 Example shown. The method of cascading is to ground the DC input terminal VL of the first-stage rectification circuit, and connect the input terminal VH to the input terminal VL of the second-stage rectification circuit, and so on. Using in series can increase the output DC level of the rectification circuit. The RF input signal terminals VP+ and VP- of the rectification circuit of each stage are respectively connected to the positive and negative terminals of the RF input signal, and the Vpmos and Vnmos floating gate adjustment terminals are also respectively connected together to connect to the external control input.

[0020] Figure 4 Shown is a three-stage voltage doubler rectification circuit structure, wherein VRF12 is the rad...

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PUM

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Abstract

The invention belongs to technical area of IC design. The adjustable rectification circuit is composed of capacitors and standard CMOS transistors. Raising or lowering voltage of floating gate adjusts threshold of transistor in circuit to increase rectification efficiency of radio frequency rectification circuit. The invention is able to adjust rectification efficiency dynamically so as to optimize communication distance of electric label in radio frequency.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design. In particular, it relates to a rectification circuit with adjustable threshold value of a floating gate structure used for radio frequency electronic tags. technical background [0002] With the rapid development of microelectronics technology, CMOS technology has been able to manufacture chips used in microwave bands, and radio frequency circuits can be integrated into chips of large-scale digital circuits. Low-cost wireless systems manufactured with CMOS technology will open up wider application fields. Radio frequency tags are a very promising application field. [0003] When the barcode was launched in 1973, its inventor predicted that 25 years later, there would be a new technology to replace the barcode. Now, radio frequency tags have come to people. It is not only a simple replacement for barcodes, but also integrates the latest information technologies such as wirele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/155
Inventor 李强朱正
Owner SHANGHAI QUANRAY ELECTRONICS