Radio frequency power supply circuit and ultrahigh frequency passive electronic tag

Abstract

The present invention provides a radio frequency power supply circuit and an ultrahigh frequency passive electronic tag. The circuit comprises a charge pump consisting of a radio frequency energy input end, a first direct current output end and a second direct current output end, the radio frequency energy input end is connected with the antenna of the ultrahigh frequency passive electronic tag to receive the radio frequency energy in the ultrahigh frequency signals, and the first direct current output end and the second direct current output end are respectively configured to output the first direct voltage and the second direct voltage generated after the radio frequency energy conversation, wherein the second direct voltage is smaller than the first direct voltage. According to the technical scheme, the radio frequency power supply circuit and the ultrahigh frequency passive electronic tag can simply and effectively eliminate the voltage consumption generated by connecting in series with a voltage stabilizing circuit in the prior art, and can output a plurality of power voltages so as to satisfy different usage requirements and substantially reduce the power consumption.

Description

technical field [0001] The invention relates to the technical field of radio frequency and electronic tags, in particular to a radio frequency power supply circuit and an ultra-high frequency passive electronic tag. Background technique [0002] At present, in the field of wireless charging technology, there are many well-known technical means for transferring energy through radio frequency electromagnetic waves. Typical applications include wireless charging mobile devices and passive RFID (Radio Frequency Identification, radio frequency identification) chips. Specifically, when using a non-contact wireless charging mobile device to charge, the radio frequency energy is provided by the wireless charging station (station), while in the passive RFID chip application, the radio frequency energy is provided by the reader or interrogator, further, The radio frequency electromagnetic wave is received by the antenna of the receiving device and rectified to generate the required DC...

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Problems solved by technology

However, if image 3 The series regulator circuit shown also consumes power itself, resulting in a smaller than expected improvement in power utilization efficiency

For example, if the supply voltage of the logic circuit is Vdd, the average current consumption is I 1 , its power consumption is Vdd×I 1 , and when the supply voltage of the logic circuit is Vdd 2 , the average current consumption is I 2 , its power consumption is Vdd2×I 2 , where, Vdd22 1 , but at this time the total power consumption of the logic circuit and the series regulator is Vdd×I 2 , then (Vdd–Vdd2)×I 2 part is wasted

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